py3: slice over bytes or use startswith() to prevent getting ascii values

Differential Revision: https://phab.mercurial-scm.org/D2496

mercurial/commands.py

@@ -4482,7 +4482,7 b' def resolve(ui, repo, *pats, **opts):'
                 for f in ms:
                     if not m(f):
                         continue
-                    flags = ''.join(['-%s ' % o[0] for o in flaglist
+                    flags = ''.join(['-%s ' % o[0:1] for o in flaglist
                                                    if opts.get(o)])
                     hint = _("(try: hg resolve %s%s)\n") % (
                              flags,

mercurial/fileset.py

@@ -392,7 +392,7 b' def sizematcher(x):'
     elif expr.startswith(">"):
         a = util.sizetoint(expr[1:])
         return lambda x: x > a
-    elif expr[0].isdigit or expr[0] == '.':
+    elif expr[0:1].isdigit or expr.startswith('.'):
         a = util.sizetoint(expr)
         b = _sizetomax(expr)
         return lambda x: x >= a and x <= b