Make Editor::unfoldBufferRow destroy all folds containing the buffer row

Also, remove ::destroyAllFoldsContainingBufferRow as it is now redundant

src/display-buffer.coffee

@@ -169,7 +169,7 @@ class DisplayBuffer extends Model
   # Removes any folds found that contain the given buffer row.
   #
   # bufferRow - The buffer row {Number} to check against
-  destroyFoldsContainingBufferRow: (bufferRow) ->
+  unfoldBufferRow: (bufferRow) ->
     fold.destroy() for fold in @foldsContainingBufferRow(bufferRow)
 
   # Given a buffer row, this returns the largest fold that starts there.

src/editor.coffee

@@ -788,14 +788,11 @@ class Editor extends Model
   foldBufferRow: (bufferRow) ->
     @languageMode.foldBufferRow(bufferRow)
 
-  # Destroy the largest fold containing the given row in buffer
-  # coordinates.
+  # Public: Unfold all folds containing the given row in buffer coordinates.
   #
   # bufferRow - A {Number}
-  #
-  # TODO: Should this destroy all folds containing the given buffer row?
   unfoldBufferRow: (bufferRow) ->
-    @languageMode.unfoldBufferRow(bufferRow)
+    @displayBuffer.unfoldBufferRow(bufferRow)
 
   # Public: Determine whether the given row in buffer coordinates is foldable.
   #
@@ -815,14 +812,10 @@ class Editor extends Model
   destroyFoldWithId: (id) ->
     @displayBuffer.destroyFoldWithId(id)
 
-  # {Delegates to: DisplayBuffer.destroyFoldsContainingBufferRow}
-  destroyFoldsContainingBufferRow: (bufferRow) ->
-    @displayBuffer.destroyFoldsContainingBufferRow(bufferRow)
-
   # Remove any {Fold}s found that intersect the given buffer row.
   destroyFoldsIntersectingBufferRange: (bufferRange) ->
     for row in [bufferRange.start.row..bufferRange.end.row]
-      @destroyFoldsContainingBufferRow(row)
+      @unfoldBufferRow(row)
 
   # Public: Fold the given buffer row if it isn't currently folded, and unfold
   # it otherwise.
@@ -904,7 +897,7 @@ class Editor extends Model
 
         # Make sure the inserted text doesn't go into an existing fold
         if fold = @displayBuffer.largestFoldStartingAtBufferRow(insertPosition.row)
-          @destroyFoldsContainingBufferRow(insertPosition.row)
+          @unfoldBufferRow(insertPosition.row)
           foldedRows.push(insertPosition.row + endRow - startRow + fold.getBufferRange().getRowCount())
 
         @buffer.insert(insertPosition, lines)
@@ -960,7 +953,7 @@ class Editor extends Model
 
         # Make sure the inserted text doesn't go into an existing fold
         if fold = @displayBuffer.largestFoldStartingAtBufferRow(insertPosition.row)
-          @destroyFoldsContainingBufferRow(insertPosition.row)
+          @unfoldBufferRow(insertPosition.row)
           foldedRows.push(insertPosition.row + fold.getBufferRange().getRowCount())
 
         @buffer.insert(insertPosition, lines)

src/language-mode.coffee

@@ -121,12 +121,6 @@ class LanguageMode
       fold = @editor.displayBuffer.largestFoldStartingAtBufferRow(startRow)
       return @editor.createFold(startRow, endRow) unless fold
 
-  # Given a buffer row, this unfolds it.
-  #
-  # bufferRow - A {Number} indicating the buffer row
-  unfoldBufferRow: (bufferRow) ->
-    @editor.displayBuffer.largestFoldContainingBufferRow(bufferRow)?.destroy()
-
   # Find the row range for a fold at a given bufferRow. Will handle comments
   # and code.
   #

src/selection.coffee

@@ -282,7 +282,7 @@ class Selection
   #   :undo - if `skip`, skips the undo stack for this operation.
   insertText: (text, options={}) ->
     oldBufferRange = @getBufferRange()
-    @editor.destroyFoldsContainingBufferRow(oldBufferRange.end.row)
+    @editor.unfoldBufferRow(oldBufferRange.end.row)
     wasReversed = @isReversed()
     @clear()
     @cursor.needsAutoscroll = @cursor.isLastCursor()
@@ -334,11 +334,15 @@ class Selection
 
     normalizedLines.join('\n')
 
-  # Public: Indents the selection.
+  # Indent the current line(s).
+  #
+  # If the selection is empty, indents the current line if the cursor precedes
+  # non-whitespace characters, and otherwise inserts a tab. If the selection is
+  # non empty, calls {::indentSelectedRows}.
   #
   # options - A {Object} with the keys:
-  #   :autoIndent - If `true`, the indentation is performed appropriately.
-  #                 Otherwise, {Editor::getTabText} is used.
+  #   :autoIndent - If `true`, the line is indented to an automatically-inferred
+  #                 level. Otherwise, {Editor::getTabText} is inserted.
   indent: ({ autoIndent }={})->
     { row, column } = @cursor.getBufferPosition()