Fix indenting of HTML (closing) tags for instance. Fix #1294

The indentation level is not anymore reduced by adding a new line,
which previously caused multiple reductions of the indentation level.
This fixes the behavior of HTML closing tags, which currently
"jump" backwards if you try to move them down.

spec/editor-spec.coffee

@@ -1616,6 +1616,13 @@ describe "Editor", ->
         expect(editor.lineForBufferRow(1)).toBe '  '
         expect(editor.lineForBufferRow(2)).toBe '}'
 
+    describe "when a new line is appended before a closing tag (e.g. by pressing enter before a selection)", ->
+      it "moves the line down and keeps the indentation level the same when editor.autoIndent is true", ->
+        atom.config.set('editor.autoIndent', true)
+        editor.setCursorBufferPosition([9,2])
+        editor.insertNewline()
+        expect(editor.lineForBufferRow(10)).toBe '  };'
+        
     describe ".backspace()", ->
       describe "when there is a single cursor", ->
         changeScreenRangeHandler = null

src/selection.coffee

@@ -305,7 +305,10 @@ class Selection extends Model
     if options.autoIndent
       @editor.autoIndentBufferRow(row) for row in newBufferRange.getRows()
     else if options.autoIndentNewline and text == '\n'
+      currentIndentation = @editor.indentationForBufferRow(newBufferRange.start.row)
       @editor.autoIndentBufferRow(newBufferRange.end.row, preserveLeadingWhitespace: true)
+      if @editor.indentationForBufferRow(newBufferRange.end.row) < currentIndentation
+        @editor.setIndentationForBufferRow(newBufferRange.end.row, currentIndentation)
     else if options.autoDecreaseIndent and /\S/.test text
       @editor.autoDecreaseIndentForBufferRow(newBufferRange.start.row)