cleanup: remove pointless r-prefixes on single-quoted strings This is the promised second step on single-quoted strings. These had existed because our source transformer didn't turn r'' into b'', so we had tagged some strings as r-strings to get "native" strings on both Pythons. Now that the transformer is gone, we can dispense with this nonsense. Methodology: I ran hg locate 'set:added() or modified() or clean()' | egrep '.*\.py$' | xargs egrep --color=never -n -- \[\^b\]\[\^a-z\]r\'\[\^\'\\\\\]\*\'\[\^\'\ in an emacs grep-mode buffer, and then used a keyboard macro to iterate over the results and remove the r prefix as needed. # skip-blame removing unneeded r prefixes left over from Python 3 migration. Differential Revision: https://phab.mercurial-scm.org/D7306

--- a/mercurial/mdiff.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/mercurial/mdiff.py	Fri Nov 08 11:19:20 2019 -0800
@@ -27,8 +27,8 @@
 
 _missing_newline_marker = b"\\ No newline at end of file\n"
 
-bdiff = policy.importmod(r'bdiff')
-mpatch = policy.importmod(r'mpatch')
+bdiff = policy.importmod('bdiff')
+mpatch = policy.importmod('mpatch')
 
 blocks = bdiff.blocks
 fixws = bdiff.fixws