py3: catch PermissionError instead of checking errno == EPERM

mercurial/util.py

@@ -2503,12 +2503,10 b' class filestat:'
         advanced = (old.stat[stat.ST_MTIME] + 1) & 0x7FFFFFFF
         try:
             os.utime(path, (advanced, advanced))
-        except OSError as inst:
-            if inst.errno == errno.EPERM:
+        except PermissionError:
                 # utime() on the file created by another user causes EPERM,
                 # if a process doesn't have appropriate privileges
                 return False
-            raise
         return True
 
     def __ne__(self, other):