[padrino-performance] README.md: Fix typos, options, repair markup (#…

…2292)

padrino-performance/README.md

@@ -15,36 +15,33 @@ Install the gem with
 ## Available suites
 
 - JSON: Tell you if you have conflicting libraries being declared in your `Gemfile`. Why? Because they would nearly do the same job and this will help you to detect it.
-    - You can it by passing the `-j` or `--json` option.
+    - Use it by passing the `-j` or `--json` option.
 - Memory: Print the memory usage of your application when it is started.
-    - You can it by passing the `-j` or `--json` option.
+    - Use it by passing the `-m` or `--mem` option.
 
 
 ## Usage
 
 `bundle exec padrino-performance SUITE -- bundle exec padrino COMMAND`
 
-E.g.:
+Examples:
 
-- Measure json on a console:
-
-    bundle exec padrino-performance -j -- bundle exec padrino console
+- Check for conflicting json libraries on a console:
+  ```
+    $ bundle exec padrino-performance -j -- bundle exec padrino console
     >> require 'json'
     >> require 'json_pure'
-
+  ```
     Then you will get some error reports in the terminal, which indicates that you have
     conflicting json libraries that do the same
 
-
 - Measure memory on a running app:
-
-    bundle exec padrino-performance -m -- bundle exec padrino start
-    # The output will be the following
-
+  ```
+    $ bundle exec padrino-performance -m -- bundle exec padrino start
      total    44056K
      total    44980K
     => Padrino/0.11.2 has taken the stage development at http://127.0.0.1:3000
     >> Thin web server (v1.5.1 codename Straight Razor)
     >> Maximum connections set to 1024
     >> Listening on 127.0.0.1:3000, CTRL+C to stop
-
+  ```