Rename LanguageModel::isBufferRowFoldable to ::isFoldableAtBufferRow

It blends in better with the methods on Editor.

src/editor.coffee

@@ -51,7 +51,7 @@ class Editor extends Model
 
   @delegatesMethods 'foldAll', 'unfoldAll', 'foldAllAtIndentLevel', 'foldBufferRow',
     'unfoldBufferRow', 'suggestedIndentForBufferRow', 'autoIndentBufferRow', 'autoIndentBufferRows',
-    'autoDecreaseIndentForBufferRow', 'toggleLineCommentsForBufferRows', 'isBufferRowFoldable',
+    'autoDecreaseIndentForBufferRow', 'toggleLineCommentsForBufferRows', 'isFoldableAtBufferRow',
     toProperty: 'languageMode'
 
   constructor: ({@softTabs, initialLine, tabLength, softWrap, @displayBuffer, buffer, registerEditor, suppressCursorCreation}) ->

src/gutter.coffee

@@ -209,7 +209,7 @@ class Gutter extends View
 
       classes = "line-number line-number-#{row}"
       classes += ' fold' if editor.isFoldedAtBufferRow(row)
-      classes += ' foldable' if row isnt lastRow and editor.isBufferRowFoldable(row)
+      classes += ' foldable' if row isnt lastRow and editor.isFoldableAtBufferRow(row)
 
       rowValuePadding = _.multiplyString(' ', maxDigits - rowValue.length)
 

src/language-mode.coffee

@@ -162,7 +162,7 @@ class LanguageMode
     return [startRow, endRow] if startRow isnt endRow
 
   rowRangeForCodeFoldAtBufferRow: (bufferRow) ->
-    return null unless @isBufferRowFoldable(bufferRow)
+    return null unless @isFoldableAtBufferRow(bufferRow)
 
     startIndentLevel = @editor.indentationForBufferRow(bufferRow)
     scopes = @editor.scopesForBufferPosition([bufferRow, 0])
@@ -178,7 +178,7 @@ class LanguageMode
 
     [bufferRow, foldEndRow]
 
-  isBufferRowFoldable: (bufferRow) ->
+  isFoldableAtBufferRow: (bufferRow) ->
     return false if @editor.isBufferRowBlank(bufferRow)
     nextNonEmptyRow = @editor.nextNonBlankBufferRow(bufferRow)
     return false unless nextNonEmptyRow?