graphlog: optionally strip quotes from graphnode template (BC)

For consistency with the other template options.

mercurial/cmdutil.py

@@ -2154,6 +2154,7 b' def _graphnodeformatter(ui, displayer):'
     if not spec:
         return templatekw.showgraphnode  # fast path for "{graphnode}"
 
+    spec = templater.unquotestring(spec)
     templ = formatter.gettemplater(ui, 'graphnode', spec)
     cache = {}
     if isinstance(displayer, changeset_templater):

tests/test-glog.t

@@ -2398,7 +2398,7 b' working-directory revision'
 
 node template with changeset_printer:
 
-  $ hg log -Gqr 5:7 --config ui.graphnodetemplate='{rev}'
+  $ hg log -Gqr 5:7 --config ui.graphnodetemplate='"{rev}"'
   7  7:02dbb8e276b8
   |
   6    6:fc281d8ff18d