graphlog: style with header and footer (issue2395)
The glog command didn't emit header and footer from the style, as demonstrated
by "hg glog --style xml". Asciiart combined with xml markup hardly makes sense,
but header and footer might however be useful for adding for example html pre
tags around the graph.
#!/usr/bin/env python
from hgext import color
# ensure errors aren't buffered
testui = color.colorui()
testui.pushbuffer()
testui.write('buffered\n')
testui.warn('warning\n')
testui.write_err('error\n')
print repr(testui.popbuffer())