From 2f83a39684690ed373ffd327198433a456648504 Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Sat, 20 Jan 2024 22:27:46 -0500
Subject: [PATCH 01/11] [#224] Add description for multiline puzzle and remove
 unsupported formats

---
 README.md | 43 ++++++++++++++++++++++++++++++++++++-------
 1 file changed, 36 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 0d49523..3760ecc 100644
--- a/README.md
+++ b/README.md
@@ -146,6 +146,10 @@ Example:
  * @todo #234:15m/DEV This is something to do later
  *  in one of the next releases. I can't figure out
  *  how to implement it now, that's why the puzzle.
+ *  The text can be so long, as needed, just use 
+ *  the same anount of spaces, as the second line.
+ * This text will be not a part of the puzzle, as 
+ * has less spaces. 
  */
 void sendEmail() {
   throw new UnsupportedOperationException();
@@ -172,13 +176,11 @@ as long as you have one of the 3 supported keywords right in front
 of the mandatory marker):
 
 ```
-// @todo #224
-/* @todo #TEST-13 */
-# @todo #55:45min
-@todo #67/DES
-;; @todo #678:40m/DEV
-// TODO: #1:30min
-(* TODO #42 *)
+// @todo #224 Puzzle description
+# @todo #55:45min Puzzle description
+@todo #67/DES Puzzle description
+;; @todo #678:40m/DEV Puzzle description
+// TODO: #1:30min Puzzle description
 ```
 
 Here `DES` and `DEV` are the roles of people who must fix that puzzles;
@@ -192,6 +194,33 @@ us to build a hierarchical dependency tree of all puzzles, like
 for example. Technically, of course, you can abuse the system
 and put a dummy `#1` marker everywhere.
 
+### Multiline examples
+
+```xml
+<!-- 
+ ~ if comment should be started and closed by special symbols, then place them in
+ ~ a separate lines without any text
+ ~ And any symbols can be used as a prefix, it will be excluded from the text
+ ~
+ ~ @todo #34 Description can not be created in one line with comment
+ ~ symbols. Just use at least the same amount of the spaces, as on the first line. 
+-->
+```
+
+```java
+/**
+ * @todo #36 Multiline text can use the same prefix in all lines or the same 
+ *  amount of spaces.
+    So this will be added to the puzzle description. If you want to divide the 
+ *  puzzle by empty line, just add a space to that line  
+ *   
+ *  and continue the text after.
+ *
+ *  This line is not part of the puzzle, because the line before contains less
+ *  spaces then the second line.
+ */
+```
+
 ## How to Configure Rules?
 
 You can specify post-parsing rules for your puzzles, in command line,

From 8e26e6f926fe598f321d6a7ae91141a54862f945 Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Mon, 22 Jan 2024 14:07:46 -0500
Subject: [PATCH 02/11] Update README.md

Co-authored-by: Slava Semushin <slava.semushin@gmail.com>
---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 3760ecc..3dde0f2 100644
--- a/README.md
+++ b/README.md
@@ -149,7 +149,7 @@ Example:
  *  The text can be so long, as needed, just use 
  *  the same anount of spaces, as the second line.
  * This text will be not a part of the puzzle, as 
- * has less spaces. 
+ * it has less spaces. 
  */
 void sendEmail() {
   throw new UnsupportedOperationException();

From a2acecfc3ee0a163e6294433ce5a4d75ecb54d27 Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Mon, 22 Jan 2024 14:10:37 -0500
Subject: [PATCH 03/11] Update README.md

Co-authored-by: Slava Semushin <slava.semushin@gmail.com>
---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 3dde0f2..7407fa3 100644
--- a/README.md
+++ b/README.md
@@ -200,7 +200,7 @@ and put a dummy `#1` marker everywhere.
 <!-- 
  ~ if comment should be started and closed by special symbols, then place them in
  ~ a separate lines without any text
- ~ And any symbols can be used as a prefix, it will be excluded from the text
+ ~ Any symbol can be used as a prefix, it will be excluded from the text
  ~
  ~ @todo #34 Description can not be created in one line with comment
  ~ symbols. Just use at least the same amount of the spaces, as on the first line. 

From 0c10776b702d3a7b9a7996529254b7b48635cd29 Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Fri, 26 Jan 2024 23:02:33 -0500
Subject: [PATCH 04/11] [#224] Change space symbol to backslash for newline

---
 Gemfile                            |  2 +-
 README.md                          |  6 ++--
 features/step_definitions/steps.rb | 20 -------------
 lib/pdd/source.rb                  | 37 +++++++++++++++++++----
 test/test_source.rb                |  2 +-
 test/test_source_todo.rb           | 48 ++++++++++++++++++++++++++----
 test_assets/puzzles/44-660e9d6f    |  2 +-
 7 files changed, 79 insertions(+), 38 deletions(-)

diff --git a/Gemfile b/Gemfile
index 35b4ca5..8bfca51 100644
--- a/Gemfile
+++ b/Gemfile
@@ -27,7 +27,7 @@ gem 'minitest', '5.16.2', require: false
 gem 'rake', '13.0.6', require: false
 gem 'rdoc', '6.4.0', require: false
 gem 'rspec-rails', '5.1.2', require: false
-gem 'rubocop', '1.53.1', require: false
+gem 'rubocop', '1.60.2', require: false
 gem 'rubocop-rspec', '2.22.0', require: false
 gem 'simplecov', '0.22.0', require: false
 gem 'slop', '4.9.2', require: false
diff --git a/README.md b/README.md
index 7407fa3..7813730 100644
--- a/README.md
+++ b/README.md
@@ -211,9 +211,9 @@ and put a dummy `#1` marker everywhere.
 /**
  * @todo #36 Multiline text can use the same prefix in all lines or the same 
  *  amount of spaces.
-    So this will be added to the puzzle description. If you want to divide the 
- *  puzzle by empty line, just add a space to that line  
- *   
+ *  So this will be added to the puzzle description. If you want to divide the 
+ *  puzzle by empty line, just add a backspace to that line  
+ *  \
  *  and continue the text after.
  *
  *  This line is not part of the puzzle, because the line before contains less
diff --git a/features/step_definitions/steps.rb b/features/step_definitions/steps.rb
index 1c8b825..8a194bd 100644
--- a/features/step_definitions/steps.rb
+++ b/features/step_definitions/steps.rb
@@ -83,10 +83,6 @@
   raise "STDOUT doesn't contain '#{txt}':\n#{@stdout}" unless @stdout.include?(txt)
 end
 
-Then(/^Stdout is empty$/) do
-  raise "STDOUT is not empty:\n#{@stdout}" unless @stdout == ''
-end
-
 Then(/^XML file "([^"]+)" matches "([^"]+)"$/) do |file, xpath|
   raise "File #{file} doesn't exit" unless File.exist?(file)
 
@@ -103,14 +99,6 @@
     if content.index(substring).nil?
 end
 
-Then(/^Exit code is zero$/) do
-  raise "Non-zero exit code #{@exitstatus}" unless @exitstatus.zero?
-end
-
-Then(/^Exit code is not zero$/) do
-  raise 'Zero exit code' if @exitstatus.zero?
-end
-
 When(/^I run bash with$/) do |text|
   FileUtils.copy_entry(@cwd, File.join(@dir, 'pdd'))
   @stdout = `#{text}`
@@ -122,11 +110,3 @@
   @stdout = `#{text}`
   @exitstatus = $CHILD_STATUS.exitstatus
 end
-
-Given(/^It is Unix$/) do
-  pending if Gem.win_platform?
-end
-
-Given(/^It is Windows$/) do
-  pending unless Gem.win_platform?
-end
diff --git a/lib/pdd/source.rb b/lib/pdd/source.rb
index 69037a3..534f4d8 100644
--- a/lib/pdd/source.rb
+++ b/lib/pdd/source.rb
@@ -144,13 +144,38 @@ def minutes(num, units)
     def tail(lines, prefix, start)
       return [] if lines.empty?
       prefix = " #{' ' * start}" if prefix.empty? # fallback to space indentation
-      empty_prefix = ' ' * (prefix.length + 1)
-      prefix = "#{prefix} " if lines[0][prefix.length, 1]&.start_with?(' ')
-      lines
-        .take_while do |t|
-          match_markers(t).none? && (t.start_with?(prefix) || t.start_with?(empty_prefix))
+      prefix = puzzle_text_prefix(lines, prefix)
+      tail = lines
+             .take_while { |t| puzzle_text?(t, prefix) }
+             .map do |t|
+               content = t[prefix.length, t.length]&.lstrip
+               puzzle_empty_line?(content, '') ? '' : content
+             end
+      tail.pop if tail[-1].eql?('')
+      tail
+    end
+
+    def puzzle_text_prefix(lines, prefix)
+      return prefix if lines.empty?
+      i = 0
+      while i < lines.length
+        l = lines[i] unless puzzle_empty_line?(lines[i], prefix)
+        unless l.nil?
+          return l.start_with?("#{prefix} ") ? "#{prefix} " : prefix
         end
-        .map { |t| t[prefix.length, t.length]&.lstrip }
+        i += 1
+      end
+      prefix
+    end
+
+    def puzzle_text?(line, prefix)
+      return false unless match_markers(line).none?
+      line.start_with?(prefix) || puzzle_empty_line?(line, prefix)
+    end
+
+    def puzzle_empty_line?(line, prefix)
+      return true if line.nil?
+      line.start_with?(prefix.lstrip) && line.gsub(prefix, '').chomp.strip.eql?('\\')
     end
 
     # @todo #75:30min Let's make it possible to fetch Subversion data
diff --git a/test/test_source.rb b/test/test_source.rb
index f770f1b..0eb2f07 100644
--- a/test/test_source.rb
+++ b/test/test_source.rb
@@ -48,7 +48,7 @@ def test_parsing
         assert_equal 2, list.size
         puzzle = list.first
         assert_equal '2-3', puzzle.props[:lines]
-        assert_equal 'привет, how are you doing?', \
+        assert_equal 'привет, how are you doing?',
                      puzzle.props[:body]
         assert_equal '44', puzzle.props[:ticket]
         assert puzzle.props[:author].nil?
diff --git a/test/test_source_todo.rb b/test/test_source_todo.rb
index d6c722d..600007d 100644
--- a/test/test_source_todo.rb
+++ b/test/test_source_todo.rb
@@ -112,6 +112,17 @@ def test_todo_colon_parsing
     )
   end
 
+  def test_todo_backslash_escape
+    check_valid_puzzle(
+      "
+      // TODO #45 task description with \\
+      ",
+      '2-2',
+      'task description with \\',
+      '45'
+    )
+  end
+
   def test_multiple_todo_colon
     check_valid_puzzle(
       "
@@ -150,22 +161,47 @@ def test_todo_colon_parsing_multi_line_with_empty_line
     )
   end
 
-  # space is needed in test data in the comment
-  # rubocop:disable Layout/TrailingWhitespace
   def test_todo_colon_parsing_multi_line_with_empty_line_and_space
     check_valid_puzzle(
       '
       // TODO: #46 task description
-      // 
-      //  second line after empty line is a part of the puzzle in case of space exists
+      // \
+      //  second line after empty line is a part of the puzzle in case of backslash exists
       ',
       '2-4',
       'task description second line after empty line is a part ' \
-      'of the puzzle in case of space exists',
+      'of the puzzle in case of backslash exists',
       '46'
     )
   end
-  # rubocop:enable Layout/TrailingWhitespace
+
+  def test_todo_colon_parsing_double_puzzle_with_empty_line
+    check_valid_puzzle(
+      '
+      // TODO: #46 task description for first
+      // \
+      // TODO: #47 task description
+      ',
+      '2-2',
+      'task description for first',
+      '46',
+      2
+    )
+  end
+
+  def test_todo_colon_parsing_multi_line_random_prefix
+    check_valid_puzzle(
+      '
+    ~~
+    ~~ @todo #44 First
+    ~~  and
+    ~~ second
+      ',
+      '3-4',
+      'First and',
+      '44'
+    )
+  end
 
   def test_todo_failing_no_ticket
     check_invalid_puzzle(
diff --git a/test_assets/puzzles/44-660e9d6f b/test_assets/puzzles/44-660e9d6f
index c65f59c..f662706 100644
--- a/test_assets/puzzles/44-660e9d6f
+++ b/test_assets/puzzles/44-660e9d6f
@@ -2,7 +2,7 @@
 // @todo #44 This puzzle
 // consists
 // of
-// 
+// \
 // two
 // paragraphs
 

From 194a4ba0fedd748d5e201bfc3167d3d1e88f6d9c Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Sat, 27 Jan 2024 16:32:22 -0500
Subject: [PATCH 05/11] [#224] Add a test for javadoc and small change

---
 lib/pdd/source.rb        | 19 +++++++++----------
 test/test_source_todo.rb | 15 +++++++++++++++
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/lib/pdd/source.rb b/lib/pdd/source.rb
index 534f4d8..f6c0853 100644
--- a/lib/pdd/source.rb
+++ b/lib/pdd/source.rb
@@ -144,38 +144,37 @@ def minutes(num, units)
     def tail(lines, prefix, start)
       return [] if lines.empty?
       prefix = " #{' ' * start}" if prefix.empty? # fallback to space indentation
-      prefix = puzzle_text_prefix(lines, prefix)
+      tail_prefix = puzzle_tail_prefix(lines, prefix)
       tail = lines
-             .take_while { |t| puzzle_text?(t, prefix) }
+             .take_while { |t| puzzle_text?(t, tail_prefix, prefix) }
              .map do |t|
-               content = t[prefix.length, t.length]&.lstrip
+               content = t[tail_prefix.length, t.length]&.lstrip
                puzzle_empty_line?(content, '') ? '' : content
              end
       tail.pop if tail[-1].eql?('')
       tail
     end
 
-    def puzzle_text_prefix(lines, prefix)
+    def puzzle_tail_prefix(lines, prefix)
       return prefix if lines.empty?
       i = 0
       while i < lines.length
-        l = lines[i] unless puzzle_empty_line?(lines[i], prefix)
-        unless l.nil?
-          return l.start_with?("#{prefix} ") ? "#{prefix} " : prefix
+        unless puzzle_empty_line?(lines[i], prefix)
+          return lines[i].start_with?("#{prefix} ") ? "#{prefix} " : prefix
         end
         i += 1
       end
       prefix
     end
 
-    def puzzle_text?(line, prefix)
+    def puzzle_text?(line, prefix, intro_prefix)
       return false unless match_markers(line).none?
-      line.start_with?(prefix) || puzzle_empty_line?(line, prefix)
+      line.start_with?(prefix) || puzzle_empty_line?(line, intro_prefix)
     end
 
     def puzzle_empty_line?(line, prefix)
       return true if line.nil?
-      line.start_with?(prefix.lstrip) && line.gsub(prefix, '').chomp.strip.eql?('\\')
+      line.start_with?(prefix) && line.gsub(prefix, '').chomp.strip.eql?('\\')
     end
 
     # @todo #75:30min Let's make it possible to fetch Subversion data
diff --git a/test/test_source_todo.rb b/test/test_source_todo.rb
index 600007d..b25e36e 100644
--- a/test/test_source_todo.rb
+++ b/test/test_source_todo.rb
@@ -189,6 +189,21 @@ def test_todo_colon_parsing_double_puzzle_with_empty_line
     )
   end
 
+  def test_todo_parsing_puzzle_javadoc_with_empty_line
+    check_valid_puzzle(
+      '
+      /**
+       * TODO: #46 task description
+       * \
+       */
+       * some text
+      ',
+      '3-3',
+      'task description',
+      '46'
+    )
+  end
+
   def test_todo_colon_parsing_multi_line_random_prefix
     check_valid_puzzle(
       '

From a71e6573ed34b7a0c256511bebe80fd0f5d140ab Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Wed, 31 Jan 2024 11:58:59 -0500
Subject: [PATCH 06/11] Update README.md

Remove task numbers from the result description
---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 7813730..374c16e 100644
--- a/README.md
+++ b/README.md
@@ -185,7 +185,7 @@ of the mandatory marker):
 
 Here `DES` and `DEV` are the roles of people who must fix that puzzles;
 `45min` and `40m` is the amount of time the puzzle should take;
-`224`, `TEST-13`, `55`, `67`, `678`, `1`, and `42` are the IDs of the tickets
+`224`, `55`, `67`, `678` and `1` are the IDs of the tickets
 these puzzles are coming from.
 
 Markers are absolutely necessary for all puzzles, because they allow

From 291030b62e209c2914f60c1028ad28a97c0e5287 Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Wed, 31 Jan 2024 23:02:12 -0500
Subject: [PATCH 07/11] [#238] Add another example for ticket id's

---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 374c16e..76b6767 100644
--- a/README.md
+++ b/README.md
@@ -180,12 +180,12 @@ of the mandatory marker):
 # @todo #55:45min Puzzle description
 @todo #67/DES Puzzle description
 ;; @todo #678:40m/DEV Puzzle description
-// TODO: #1:30min Puzzle description
+// TODO: #TEST-21:30min Puzzle description
 ```
 
 Here `DES` and `DEV` are the roles of people who must fix that puzzles;
 `45min` and `40m` is the amount of time the puzzle should take;
-`224`, `55`, `67`, `678` and `1` are the IDs of the tickets
+`224`, `55`, `67`, `678` and `TEST-21` are the IDs of the tickets
 these puzzles are coming from.
 
 Markers are absolutely necessary for all puzzles, because they allow

From 438d324e77cfccc6b4e35f0d6e762155b0a38052 Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Wed, 31 Jan 2024 23:48:14 -0500
Subject: [PATCH 08/11] [#238] Add a test for last empty line

---
 test/test_source_todo.rb | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/test/test_source_todo.rb b/test/test_source_todo.rb
index b25e36e..d13b01f 100644
--- a/test/test_source_todo.rb
+++ b/test/test_source_todo.rb
@@ -204,6 +204,19 @@ def test_todo_parsing_puzzle_javadoc_with_empty_line
     )
   end
 
+  def test_todo_parsing_puzzle_last_empty_line
+    check_valid_puzzle(
+      '
+      /**
+       * TODO: #47 task description
+       * \
+',
+      '3-3',
+      'task description',
+      '47'
+    )
+  end
+
   def test_todo_colon_parsing_multi_line_random_prefix
     check_valid_puzzle(
       '

From 4e4fe3984ec58e78b9e72cfaa078247a2f19423e Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Thu, 1 Feb 2024 09:27:01 -0500
Subject: [PATCH 09/11] [#238] Return back steps

---
 features/step_definitions/steps.rb | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/features/step_definitions/steps.rb b/features/step_definitions/steps.rb
index 8a194bd..1c8b825 100644
--- a/features/step_definitions/steps.rb
+++ b/features/step_definitions/steps.rb
@@ -83,6 +83,10 @@
   raise "STDOUT doesn't contain '#{txt}':\n#{@stdout}" unless @stdout.include?(txt)
 end
 
+Then(/^Stdout is empty$/) do
+  raise "STDOUT is not empty:\n#{@stdout}" unless @stdout == ''
+end
+
 Then(/^XML file "([^"]+)" matches "([^"]+)"$/) do |file, xpath|
   raise "File #{file} doesn't exit" unless File.exist?(file)
 
@@ -99,6 +103,14 @@
     if content.index(substring).nil?
 end
 
+Then(/^Exit code is zero$/) do
+  raise "Non-zero exit code #{@exitstatus}" unless @exitstatus.zero?
+end
+
+Then(/^Exit code is not zero$/) do
+  raise 'Zero exit code' if @exitstatus.zero?
+end
+
 When(/^I run bash with$/) do |text|
   FileUtils.copy_entry(@cwd, File.join(@dir, 'pdd'))
   @stdout = `#{text}`
@@ -110,3 +122,11 @@
   @stdout = `#{text}`
   @exitstatus = $CHILD_STATUS.exitstatus
 end
+
+Given(/^It is Unix$/) do
+  pending if Gem.win_platform?
+end
+
+Given(/^It is Windows$/) do
+  pending unless Gem.win_platform?
+end

From 53b9be57d5711c7e5da8a5923d48ca54ff961fda Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Thu, 1 Feb 2024 14:22:12 -0500
Subject: [PATCH 10/11] [#238] Flag to fail Cucumber tests in case of missing
 steps

---
 Rakefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Rakefile b/Rakefile
index bc476df..9508150 100644
--- a/Rakefile
+++ b/Rakefile
@@ -74,7 +74,7 @@ end
 
 require 'cucumber/rake/task'
 Cucumber::Rake::Task.new(:features) do |t|
-  t.cucumber_opts = 'features'
+  t.cucumber_opts = %w[features --strict-undefined]
   Rake::Cleaner.cleanup_files(['coverage'])
 end
 Cucumber::Rake::Task.new(:'features:html') do |t|

From 317b97622437de553f8c14382ab233a8a0f1bbb0 Mon Sep 17 00:00:00 2001
From: Natalia Pozhidaeva <Natalia_Pozhidaeva@epam.com>
Date: Fri, 2 Feb 2024 00:25:42 -0500
Subject: [PATCH 11/11] [#238] Changed description

---
 README.md | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 28f8d56..fb5f069 100644
--- a/README.md
+++ b/README.md
@@ -166,14 +166,24 @@ and put a dummy `#1` marker everywhere.
 
 ### Multiline examples
 
+For multiline puzzles there are two important things:
+- **prefix** - any optional text followed by space before puzzle keyword (todo). 
+It should be the same for all lines of puzzle description.
+- \ symbol can be used to logically divide puzzle description.
+prefix should be presented with it.
+
+Examples:
+
 ```xml
 <!-- 
  ~ if comment should be started and closed by special symbols, then place them in
- ~ a separate lines without any text
- ~ Any symbol can be used as a prefix, it will be excluded from the text
+ ~ a separate lines
+ ~ Any symbol can be used as a prefix, it will be excluded from the text.
+ ~ But do not forget about the space before puzzle keyword.
  ~
- ~ @todo #34 Description can not be created in one line with comment
- ~ symbols. Just use at least the same amount of the spaces, as on the first line. 
+ ~ @todo #34 Description can be as long as needed.
+ ~  Just use at least the same amount of the spaces, as on the first line. 
+ ~  It will be added to description.
 -->
 ```
 
@@ -182,12 +192,12 @@ and put a dummy `#1` marker everywhere.
  * @todo #36 Multiline text can use the same prefix in all lines or the same 
  *  amount of spaces.
  *  So this will be added to the puzzle description. If you want to divide the 
- *  puzzle by empty line, just add a backspace to that line  
+ *  puzzle logically by empty line, just add a backspace to that line  
  *  \
  *  and continue the text after.
  *
- *  This line is not part of the puzzle, because the line before contains less
- *  spaces then the second line.
+ *  This line is not part of the puzzle, because the line before does not contain
+ *  prefix.
  */
 ```