Use class methods to create native object shims

CoffeeScript 1.5 complains if a constructor has
a returns a value.

src/app/git.coffee

@@ -24,7 +24,7 @@ class Git
     ignore: 1 << 14
 
   constructor: (path, options={}) ->
-    @repo = new GitRepository(path)
+    @repo = GitRepository.open(path)
     refreshIndexOnFocus = options.refreshIndexOnFocus ? true
     if refreshIndexOnFocus
       $ = require 'jquery'

src/app/language-mode.coffee

@@ -30,13 +30,13 @@ class LanguageMode
 
     buffer = @editSession.buffer
     commentStartRegexString = _.escapeRegExp(commentStartString).replace(/(\s+)$/, '($1)?')
-    commentStartRegex = new OnigRegExp("^(\\s*)(#{commentStartRegexString})")
+    commentStartRegex = OnigRegExp.create("^(\\s*)(#{commentStartRegexString})")
     shouldUncomment = commentStartRegex.test(buffer.lineForRow(start))
 
     if commentEndString = syntax.getProperty(scopes, "editor.commentEnd")
       if shouldUncomment
         commentEndRegexString = _.escapeRegExp(commentEndString).replace(/^(\s+)/, '($1)?')
-        commentEndRegex = new OnigRegExp("(#{commentEndRegexString})(\\s*)$")
+        commentEndRegex = OnigRegExp.create("(#{commentEndRegexString})(\\s*)$")
         startMatch =  commentStartRegex.search(buffer.lineForRow(start))
         endMatch = commentEndRegex.search(buffer.lineForRow(end))
         if startMatch and endMatch
@@ -152,12 +152,12 @@ class LanguageMode
 
   increaseIndentRegexForScopes: (scopes) ->
     if increaseIndentPattern = syntax.getProperty(scopes, 'editor.increaseIndentPattern')
-      new OnigRegExp(increaseIndentPattern)
+      OnigRegExp.create(increaseIndentPattern)
 
   decreaseIndentRegexForScopes: (scopes) ->
     if decreaseIndentPattern = syntax.getProperty(scopes, 'editor.decreaseIndentPattern')
-      new OnigRegExp(decreaseIndentPattern)
+      OnigRegExp.create(decreaseIndentPattern)
 
   foldEndRegexForScopes: (scopes) ->
     if foldEndPattern = syntax.getProperty(scopes, 'editor.foldEndPattern')
-      new OnigRegExp(foldEndPattern)
+      OnigRegExp.create(foldEndPattern)

src/app/text-mate-grammar.coffee

@@ -28,7 +28,7 @@ class TextMateGrammar
   constructor: ({ @name, @fileTypes, @scopeName, patterns, repository, @foldingStopMarker, firstLineMatch}) ->
     @initialRule = new Rule(this, {@scopeName, patterns})
     @repository = {}
-    @firstLineRegex = new OnigRegExp(firstLineMatch) if firstLineMatch
+    @firstLineRegex = OnigRegExp.create(firstLineMatch) if firstLineMatch
     @fileTypes ?= []
 
     for name, data of repository
@@ -111,7 +111,7 @@ class Rule
         regex = pattern.regexSource
       regexes.push regex if regex
 
-    regexScanner = new OnigScanner(regexes)
+    regexScanner = OnigScanner.create(regexes)
     regexScanner.patterns = patterns
     @scannersByBaseGrammarName[baseGrammar.name] = regexScanner unless anchored
     regexScanner

src/stdlib/git-repository.coffee

@@ -1,11 +1,11 @@
 module.exports =
 class GitRepository
-  constructor: (path) ->
+  @open: (path) ->
     unless repo = $git.getRepository(path)
       throw new Error("No Git repository found searching path: #{path}")
     repo.constructor = GitRepository
     repo.__proto__ = GitRepository.prototype
-    return repo
+    repo
 
   getHead: $git.getHead
   getPath: $git.getPath

src/stdlib/onig-reg-exp.coffee

@@ -1,11 +1,11 @@
 module.exports =
 class OnigRegExp
-  constructor: (source) ->
+  @create: (source) ->
     regexp = $onigRegExp.buildOnigRegExp(source);
     regexp.constructor = OnigRegExp
     regexp.__proto__ = OnigRegExp.prototype
     regexp.source = source
-    return regexp
+    regexp
 
   search: $onigRegExp.search
   test: $onigRegExp.test

src/stdlib/onig-scanner.coffee

@@ -1,10 +1,10 @@
 module.exports =
 class OnigScanner
-  constructor: (sources) ->
+  @create: (sources) ->
     scanner = $onigScanner.buildScanner(sources)
     scanner.constructor = OnigScanner
     scanner.__proto__ = OnigScanner.prototype
     scanner.sources = sources
-    return scanner
+    scanner
 
   findNextMatch: $onigScanner.findNextMatch