[Github] Fix issue number escaping

Author: cor3ntin

llvm/utils/git/github-automation.py

@@ -51,9 +51,9 @@ def escape_description(str):
     # https://github.com/github/markup/issues/1168#issuecomment-494946168
     str = html.escape(str, False)
     # '@' followed by alphanum is a user name
-    str = re.sub("@(?=\w+)", "@<!-- -->", str)
+    str = re.sub("@(?=\w)", "@<!-- -->", str)
     # '#' followed by digits is considered an issue number
-    str = re.sub("#(?=\d+\s)", "#<!-- -->", str)
+    str = re.sub("#(?=\d)", "#<!-- -->", str)
     return str