[syntax_highlight] Remove duplicate end_user_action call.

syntax_highlight/manifest.ini

@@ -3,7 +3,7 @@
 # branch or so...
 name: Source Code Syntax Highlight
 short_name: syntax_highlight
-version: 1.1.0
+version: 1.1.1
 description: Source Code Syntax Highlighting in the chatbox.
 
 	It uses markdown-style syntax, i.e. text in between `single backticks` is

syntax_highlight/syntax_highlight.py

@@ -455,8 +455,6 @@ class ChatSyntaxHighlighter:
         buf.get_tag_table().add(tag)
         buf.apply_tag(tag, start_iter, buf.get_end_iter())
 
-        buf.end_user_action()
-
     def __init__(self, config, textview):
         self.last_end_mark  = None
         self.config         = config