Play better with expanded snippets

lib/emmet.coffee

@@ -48,10 +48,21 @@ multiSelectionActionDecorator = (action) ->
 runAction = (action, evt) ->
   syntax = editorProxy.getSyntax()
   if action is 'expand_abbreviation_with_tab'
-    # do not handle Tab key for unknown syntaxes
+    # do not handle Tab key if:
+    # 1. syntax is unknown
+    # 2. there’s a selection (user wants to indent it)
+    # 3. has expanded snippet (e.g. has tabstops)
     activeEditor = editorProxy.editor;
     if not resources.hasSyntax(syntax) or not activeEditor.getSelection().isEmpty()
       return evt.abortKeyBinding()
+    if activeEditor.snippetExpansion
+      # in case of snippet expansion: expand abbreviation if we currently on last
+      # tabstop
+      se = activeEditor.snippetExpansion
+      if se.tabStopIndex + 1 >= se.tabStopMarkers.length
+        se.destroy()
+      else
+        return evt.abortKeyBinding()
 
   if action is 'toggle_comment' and toggleCommentSyntaxes.indexOf(syntax) is -1
     return evt.abortKeyBinding()