graphlog: pass function arguments without expansion

It's annoying on Python 3 because keys must be unicode type. Let's stop using
**opts expansion when not necessary.

mercurial/cmdutil.py

@@ -2212,7 +2212,7 b' def displaygraph(ui, repo, dag, displaye'
             graphmod.ascii(ui, state, type, char, lines, coldata)
     displayer.close()
 
-def graphlog(ui, repo, *pats, **opts):
+def graphlog(ui, repo, pats, opts):
     # Parameters are identical to log command ones
     revs, expr, filematcher = getgraphlogrevs(repo, pats, opts)
     revdag = graphmod.dagwalker(repo, revs)

mercurial/commands.py

@@ -3398,7 +3398,7 b' def log(ui, repo, *pats, **opts):'
         del opts['follow']
 
     if opts.get('graph'):
-        return cmdutil.graphlog(ui, repo, *pats, **opts)
+        return cmdutil.graphlog(ui, repo, pats, opts)
 
     revs, expr, filematcher = cmdutil.getlogrevs(repo, pats, opts)
     limit = cmdutil.loglimit(opts)