Fix which-function-mode hang

This is a bug fix release.

Fixes which-function-mode hang when running swift-mode:current-defun-name in a non swift-mode buffer.

This affected users who have which-function-mode enabled globally.

Add current-defun-name

which-function-mode and add-change-log-entry work as expected now.

Fixes handling of unmatched parenthesis.

Fix beginning/end-of-sentence

Added tests and fixed beginning/end-of-sentence.

Sentences, comments, and defuns

Added beginning-of/end-of/mark/narrow-to/kill-sentence. A sentence is a statement outside strings or comments. Inside strings or comments, it indicates ordinal sentence.

Handling of comments and defuns are improved. Declarations other than functions are now defun.

Improved comments and defuns

Added comment style option.

Now we can choose multiline comment styles.

Java style:

/**
 * Foo
 * Bar
 */

Swift Quick Help style:

/**
 Foo
 Bar
 */

https://developer.apple.com/library/content/documentation/Xcode/Reference/xcode_markup_formatting_ref/index.html

Quick Help style is the default.

Single line comment now inherits spaces from the previous line.

/// - aaa
///   - bbb // When M-j (indent-new-comment-line) is pressed here,
///   // triple spaces will be inserted after slashes.

Improved functions related to defuns. More robust and sensible behaviors.

Multiline strings with interpolation

Supports multiline strings with interpolation:

let x = """
  The quick brown \(
    fox()
  ) jumps over the lazy \(
    dog()
  )
  """

Add build/debug command

Added commands to build/debug Swift modules/iOS apps.

See swift-mode:build-swift-module, swift-mode:build-ios-app, swift-mode:debug-swift-module, and swift-mode:debug-ios-app.

Fix indentation for catch block

v2.2.4

Bump version to 2.2.4

Better indent-new-comment

swift-mode:indent-new-comment-line (M-j or C-M-j) now inhertis slashes from the previous line. Example:

/// Some documentation comment
///
/// Typing M-j here will insert three slashes on the next line instead of two.

Fix indentation for keywords used as parameter names

The following code is now correctly indented.

foo(
  in: 1
)

foo(
  where: 1
)