util: teach escapedata() about bytearray

re.map doesn't seem to know about bytearray (at least in Python 2).
Cast bytearray to a bytes to work around this inconvenience.

Differential Revision: https://phab.mercurial-scm.org/D2582

mercurial/util.py

@@ -702,6 +702,9 b' DATA_ESCAPE_MAP.update({'
 DATA_ESCAPE_RE = remod.compile(br'[\x00-\x08\x0a-\x1f\\\x7f-\xff]')
 
 def escapedata(s):
+    if isinstance(s, bytearray):
+        s = bytes(s)
+
     return DATA_ESCAPE_RE.sub(lambda m: DATA_ESCAPE_MAP[m.group(0)], s)
 
 class fileobjectobserver(object):