help: fix 'hg help -k' matching an extension without docs
getattr is not needed, __doc__ always exists and defaults to None
revlog: zlib.error sent to the user (
issue3424)
Give the user the zlib error message instead of a backtrace when decompression
fails.
statichttprepo: don't send Range header when requesting entire file
When requesting files using statichttprepo.httprangereader, a request for the
entire file is sent with a Range: bytes=0- header. This causes problems with
web servers such as Cherokee that return an HTTP 416 when an empty file is
requested in this way, which in turn cause some repository clone attempts to
fail. This patch omits the Range header when the entire file is being
requested, which fixes the problem.