Log Message:
py-mercurial: Update to 6.5.2

pkgsrc changes:
---------------
  * Shift patch lines to suppress offset.

upstream changes:
-----------------
Mercurial 6.5.2
  o hgweb: encode WSGI environment using the ISO-8859-1 codec
  o rhg: fix the bug where sparse config is interpreted as relglob instead of glob
  o gpg: fix an UnboundLocalError whenever using --force
  o transaction: fix repr() and make the default name bytes
  o setup: make the error "Unable to find a working hg binary" more \ 
informative
  o tests: avoid test environment affecting setup.py
  o run-tests: detect HGWITHRUSTEXT value