write to stderr with a single write call.
this works around
issue88.
Tidyups for run-tests.py inc. try/finally cleanup and allow tests to be specified on command line
Try harder to display node hashes in tags view in monospaced font.
Used to work around Firefox's behaviour if "Allow pages to choose their
own fonts" is disabled.
hgweb templates: Don't word wrap "foo bar ago" (e.g. "3 months\nago")
This made log entries or hgwebdir index look ugly with certain browser widths.