cleanup: remove pointless r-prefixes on double-quoted strings This is only double-quoted strings. I'll do single-quoted strings as a second step. 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 -- \[\^a-z\]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/D7305

--- a/mercurial/debugcommands.py	Thu Nov 07 03:59:22 2019 -0800
+++ b/mercurial/debugcommands.py	Thu Nov 07 13:18:19 2019 -0500
@@ -651,7 +651,7 @@
 )
 def debugdate(ui, date, range=None, **opts):
     """parse and display a date"""
-    if opts[r"extended"]:
+    if opts["extended"]:
         d = dateutil.parsedate(date, util.extendeddateformats)
     else:
         d = dateutil.parsedate(date)
@@ -877,7 +877,7 @@
             timestr = b'set                 '
         else:
             timestr = time.strftime(
-                r"%Y-%m-%d %H:%M:%S ", time.localtime(ent[3])
+                "%Y-%m-%d %H:%M:%S ", time.localtime(ent[3])
             )
             timestr = encoding.strtolocal(timestr)
         if ent[1] & 0o20000: