branches: merge white space to format string

Diffs of test output should be harmless.  A white space character is moved
into "log.changeset" color region.

mercurial/commands.py

@@ -1124,8 +1124,6 b' def branches(ui, repo, active=False, clo'
         rev = ctx.rev()
         padsize = max(31 - len(str(rev)) - encoding.colwidth(tag), 0)
         fmt = ' ' * padsize + '%d:%s'
-        if not ui.quiet:
-            fm.plain(' ')
         fm.condwrite(not ui.quiet, 'rev node', fmt, rev, hexfunc(ctx.node()),
                      label='log.changeset changeset.%s' % ctx.phasestr())
         if not ui.quiet: