Update for highlight changed text.

README.md

@@ -15,6 +15,8 @@ Now this plug-in will free you from those commands and bring back the power of u
     * The next change that will be restored by `:redo` or `<ctrl-r>` is marked as **{seq}**, it's the same as *curhead* returned by *undotree()*
     * The **[seq]** marks the last change and where further changes will be added, it's the same as *newhead* returned by *undotree()*
     * Saved changes are marked as **s** and the current change is **S**
+ 1. Live updated diff panel.
+ 1. Highlight changed text.
  1. Revert to a specific change by mouse click or enter key.
  1. Hotkey support.
  1. Display changes in diff panel.

plugin/undotree.vim

@@ -63,6 +63,12 @@ if !exists('g:undotree_HighlightChangedText')
     let g:undotree_HighlightChangedText = 1
 endif
 
+" Highlight linked syntax type.
+" You may chose your favorite through ":hi" command
+if !exists('g:undotree_HighlightSyntax')
+    let g:undotree_HighlightSyntax = "UnderLined"
+endif
+
 "Custom key mappings: add this function to your vimrc.
 "You can define whatever mapping as you like, this is a hook function which
 "will be called after undotree window initialized.
@@ -975,7 +981,7 @@ function! s:diffpanel.HighlightDiff(diffresult,targetBufnr)
     if empty(a:diffresult)
         return
     endif
-    hi link UndotreeChangedText Underlined
+    exec "hi link UndotreeChangedText ".g:undotree_HighlightSyntax
     " clear previous highlighted syntax
     if has_key(self.diffmatches,a:targetBufnr)
         for i in self.diffmatches[a:targetBufnr]