Auto-indent skips cursor over leading whitespace before inserting more

This preserves the user's intent to bring the line's total amount of leading whitespace to the desired indent level.

src/app/cursor.coffee

@@ -111,6 +111,15 @@ class Cursor
     newPosition = [position.row, 0] if newPosition.isEqual(position)
     @setBufferPosition(newPosition)
 
+  skipLeadingWhitespace: ->
+    position = @getBufferPosition()
+    range = @editSession.bufferRangeForBufferRow(position.row)
+    endOfLeadingWhitespace = null
+    @editSession.scanInRange /^[ \t]*/, range, (match, matchRange) =>
+      endOfLeadingWhitespace = matchRange.end
+
+    @setBufferPosition(endOfLeadingWhitespace) if endOfLeadingWhitespace.isGreaterThan(position)
+
   moveToEndOfLine: ->
     @setBufferPosition([@getBufferRow(), Infinity])
 

src/app/selection.coffee

@@ -187,6 +187,7 @@ class Selection
     { row, column } = @cursor.getBufferPosition()
 
     if @isEmpty()
+      @cursor.skipLeadingWhitespace()
       desiredIndent = @editSession.suggestedIndentForBufferRow(row)
       delta = desiredIndent - @cursor.getIndentLevel()