--- a/mercurial/subrepo.py	Sun Nov 10 07:30:14 2019 -0800
+++ b/mercurial/subrepo.py	Fri Nov 08 11:19:20 2019 -0800
@@ -69,8 +69,8 @@
     """Exception class used to avoid handling a subrepo error more than once"""
 
     def __init__(self, *args, **kw):
-        self.subrepo = kw.pop(r'subrepo', None)
-        self.cause = kw.pop(r'cause', None)
+        self.subrepo = kw.pop('subrepo', None)
+        self.cause = kw.pop('cause', None)
         error.Abort.__init__(self, *args, **kw)
 
 
@@ -969,24 +969,24 @@
         # 2. update the subrepo to the revision specified in
         #    the corresponding substate dictionary
         self.ui.status(_(b'reverting subrepo %s\n') % substate[0])
-        if not opts.get(r'no_backup'):
+        if not opts.get('no_backup'):
             # Revert all files on the subrepo, creating backups
             # Note that this will not recursively revert subrepos
             # We could do it if there was a set:subrepos() predicate
             opts = opts.copy()
-            opts[r'date'] = None
-            opts[r'rev'] = substate[1]
+            opts['date'] = None
+            opts['rev'] = substate[1]
 
             self.filerevert(*pats, **opts)
 
         # Update the repo to the revision specified in the given substate
-        if not opts.get(r'dry_run'):
+        if not opts.get('dry_run'):
             self.get(substate, overwrite=True)
 
     def filerevert(self, *pats, **opts):
-        ctx = self._repo[opts[r'rev']]
+        ctx = self._repo[opts['rev']]
         parents = self._repo.dirstate.parents()
-        if opts.get(r'all'):
+        if opts.get('all'):
             pats = [b'set:modified()']
         else:
             pats = []
@@ -1066,7 +1066,7 @@
         if not self.ui.interactive():
             # Making stdin be a pipe should prevent svn from behaving
             # interactively even if we can't pass --non-interactive.
-            extrakw[r'stdin'] = subprocess.PIPE
+            extrakw['stdin'] = subprocess.PIPE
             # Starting in svn 1.5 --non-interactive is a global flag
             # instead of being per-command, but we need to support 1.4 so
             # we have to be intelligent about what commands take
@@ -1125,14 +1125,14 @@
         # both. We used to store the working directory one.
         output, err = self._svncommand([b'info', b'--xml'])
         doc = xml.dom.minidom.parseString(output)
-        entries = doc.getElementsByTagName(r'entry')
+        entries = doc.getElementsByTagName('entry')
         lastrev, rev = b'0', b'0'
         if entries:
-            rev = pycompat.bytestr(entries[0].getAttribute(r'revision')) or b'0'
-            commits = entries[0].getElementsByTagName(r'commit')
+            rev = pycompat.bytestr(entries[0].getAttribute('revision')) or b'0'
+            commits = entries[0].getElementsByTagName('commit')
             if commits:
                 lastrev = (
-                    pycompat.bytestr(commits[0].getAttribute(r'revision'))
+                    pycompat.bytestr(commits[0].getAttribute('revision'))
                     or b'0'
                 )
         return (lastrev, rev)
@@ -1149,23 +1149,23 @@
         output, err = self._svncommand([b'status', b'--xml'])
         externals, changes, missing = [], [], []
         doc = xml.dom.minidom.parseString(output)
-        for e in doc.getElementsByTagName(r'entry'):
-            s = e.getElementsByTagName(r'wc-status')
+        for e in doc.getElementsByTagName('entry'):
+            s = e.getElementsByTagName('wc-status')
             if not s:
                 continue
-            item = s[0].getAttribute(r'item')
-            props = s[0].getAttribute(r'props')
-            path = e.getAttribute(r'path').encode('utf8')
-            if item == r'external':
+            item = s[0].getAttribute('item')
+            props = s[0].getAttribute('props')
+            path = e.getAttribute('path').encode('utf8')
+            if item == 'external':
                 externals.append(path)
-            elif item == r'missing':
+            elif item == 'missing':
                 missing.append(path)
             if item not in (
-                r'',
-                r'normal',
-                r'unversioned',
-                r'external',
-            ) or props not in (r'', r'none', r'normal'):
+                '',
+                'normal',
+                'unversioned',
+                'external',
+            ) or props not in ('', 'none', 'normal'):
                 changes.append(path)
         for path in changes:
             for ext in externals:
@@ -1291,13 +1291,13 @@
         output = self._svncommand([b'list', b'--recursive', b'--xml'])[0]
         doc = xml.dom.minidom.parseString(output)
         paths = []
-        for e in doc.getElementsByTagName(r'entry'):
-            kind = pycompat.bytestr(e.getAttribute(r'kind'))
+        for e in doc.getElementsByTagName('entry'):
+            kind = pycompat.bytestr(e.getAttribute('kind'))
             if kind != b'file':
                 continue
-            name = r''.join(
+            name = ''.join(
                 c.data
-                for c in e.getElementsByTagName(r'name')[0].childNodes
+                for c in e.getElementsByTagName('name')[0].childNodes
                 if c.nodeType == c.TEXT_NODE
             )
             paths.append(name.encode('utf8'))
@@ -1808,7 +1808,7 @@
                 if exact:
                     rejected.append(f)
                 continue
-            if not opts.get(r'dry_run'):
+            if not opts.get('dry_run'):
                 self._gitcommand(command + [f])
 
         for f in rejected:
@@ -1849,7 +1849,7 @@
         # This should be much faster than manually traversing the trees
         # and objects with many subprocess calls.
         tarstream = self._gitcommand([b'archive', revision], stream=True)
-        tar = tarfile.open(fileobj=tarstream, mode=r'r|')
+        tar = tarfile.open(fileobj=tarstream, mode='r|')
         relpath = subrelpath(self)
         progress = self.ui.makeprogress(
             _(b'archiving (%s)') % relpath, unit=_(b'files')
@@ -1918,9 +1918,9 @@
         deleted, unknown, ignored, clean = [], [], [], []
 
         command = [b'status', b'--porcelain', b'-z']
-        if opts.get(r'unknown'):
+        if opts.get('unknown'):
             command += [b'--untracked-files=all']
-        if opts.get(r'ignored'):
+        if opts.get('ignored'):
             command += [b'--ignored']
         out = self._gitcommand(command)
 
@@ -1948,7 +1948,7 @@
             elif st == b'!!':
                 ignored.append(filename1)
 
-        if opts.get(r'clean'):
+        if opts.get('clean'):
             out = self._gitcommand([b'ls-files'])
             for f in out.split(b'\n'):
                 if not f in changedfiles:
@@ -1962,7 +1962,7 @@
     def diff(self, ui, diffopts, node2, match, prefix, **opts):
         node1 = self._state[1]
         cmd = [b'diff', b'--no-renames']
-        if opts[r'stat']:
+        if opts['stat']:
             cmd.append(b'--stat')
         else:
             # for Git, this also implies '-p'
@@ -2007,7 +2007,7 @@
     @annotatesubrepoerror
     def revert(self, substate, *pats, **opts):
         self.ui.status(_(b'reverting subrepo %s\n') % substate[0])
-        if not opts.get(r'no_backup'):
+        if not opts.get('no_backup'):
             status = self.status(None)
             names = status.modified
             for name in names:
@@ -2023,7 +2023,7 @@
                 )
                 util.rename(self.wvfs.join(name), bakname)
 
-        if not opts.get(r'dry_run'):
+        if not opts.get('dry_run'):
             self.get(substate, overwrite=True)
         return []