707     if mat:

   707     if mat:

   708         # libfuzzer is new in clang 6

   708         # libfuzzer is new in clang 6

   709         return int(mat.group(1)) > 5

   709         return int(mat.group(1)) > 5

   710     return False

   710     return False

   711 

   711 

   712 @check("xdiff", "xdiff algorithm")

   716 @check("xdiff", "xdiff algorithm")

   713 def has_xdiff():

   717 def has_xdiff():

   714     try:

   718     try:

   715         from mercurial import policy

   719         from mercurial import policy

   716         bdiff = policy.importmod('bdiff')

   720         bdiff = policy.importmod('bdiff')