[KYUUBI #320] Fix Merge PR with duplicated title

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duplicated
### _Which issue are you going to fix?_
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Fixes #${ID}

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duplicated PR ID in the merged title
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [x] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request

Closes #320 from yaooqinn/mergepr2.

8cbcf1b [peterylh] Fix Merge PR with duplicated title

Authored-by: peterylh <peterylh@163.com>
Signed-off-by: Kent Yao <yao@apache.org>

dev/merge_kyuubi_pr.py

@@ -84,7 +84,7 @@ def clean_up():
             run_cmd("git branch -D %s" % branch)
 
 def fix_title(text, num):
-    if (re.search(r'^\[KYUUBI #[0-9]{3,6}\](\[[A-Z0-9_\s,]+\] )+\S+', text)):
+    if (re.search(r'^\[KYUUBI\s#[0-9]{3,6}\].*', text)):
         return text
 
     return '[KYUUBI #%s] %s' % (num, text)