# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1573931269 -3600
# Node ID 4394687b298b0f72a1d7b54d798860ffdaa62863
# Parent  856cce0c255cc6ffbe164764cc152e3011c59fd7
pure: use string for exception in the pure version of base85

Without this change, running the test with python3 and --pure gives the
following error::

  --- /home/marmoute/src/mercurial-dev/tests/test-import-git.t
  +++ /home/marmoute/src/mercurial-dev/tests/test-import-git.t.err
  @@ -518,7 +518,7 @@
     >
     > EOF
     applying patch from stdin
  -  abort: could not decode "binary2" binary patch: bad base85 character at position 6
  +  abort: could not decode "binary2" binary patch: b'bad base85 character at position 6'
     [255]

     $ hg revert -aq

To make the cext implementation, we use a "native" string for the exception.
This fix the test failure.

diff -r 856cce0c255c -r 4394687b298b mercurial/pure/base85.py
--- a/mercurial/pure/base85.py	Tue Nov 12 11:05:03 2019 +0100
+++ b/mercurial/pure/base85.py	Sat Nov 16 20:07:49 2019 +0100
@@ -67,7 +67,7 @@
                 acc = acc * 85 + _b85dec[c]
             except KeyError:
                 raise ValueError(
-                    b'bad base85 character at position %d' % (i + j)
+                    'bad base85 character at position %d' % (i + j)
                 )
         if acc > 4294967295:
             raise ValueError(b'Base85 overflow in hunk starting at byte %d' % i)