record: get rid of ui.backupconfig

hgext/record.py

@@ -68,12 +68,9 b' def record(ui, repo, *pats, **opts):'
                          'commit')
 
     opts["interactive"] = True
-    backup = ui.backupconfig('experimental', 'crecord')
-    try:
-        ui.setconfig('experimental', 'crecord', False, 'record')
+    overrides = {('experimental', 'crecord'): False}
+    with ui.configoverride(overrides, 'record'):
         return commands.commit(ui, repo, *pats, **opts)
-    finally:
-        ui.restoreconfig(backup)
 
 def qrefresh(origfn, ui, repo, *pats, **opts):
     if not opts['interactive']:
@@ -117,13 +114,10 b' def _qrecord(cmdsuggest, ui, repo, patch'
         opts['checkname'] = False
         mq.new(ui, repo, patch, *pats, **opts)
 
-    backup = ui.backupconfig('experimental', 'crecord')
-    try:
-        ui.setconfig('experimental', 'crecord', False, 'record')
+    overrides = {('experimental', 'crecord'): False}
+    with ui.configoverride(overrides, 'record'):
         cmdutil.dorecord(ui, repo, committomq, cmdsuggest, False,
                          cmdutil.recordfilter, *pats, **opts)
-    finally:
-        ui.restoreconfig(backup)
 
 def qnew(origfn, ui, repo, patch, *args, **opts):
     if opts['interactive']: