guessing URLs but not surrounding mess

[jidanni@xxxxxxxxxxx]

When I put the cursor upon
http://en.wikipedia.org/wiki/Cadence_(music)
and do M-x w3m, I am prompted with
URL or Keyword (default popup): http://en.wikipedia.org/wiki/Cadence_
i.e., the (music) got cut off.

It should guess all the way up to the first whitespace.
(Yes, e.g., http://example.org/search?q=Tennessee farm band
would still not be guessed right, but one has to set a limit to
guessing. Hmmm, what about http://example.org/search?q="Tennessee farm band"?
No. Too messy. Just stop at the first whitespace.

Wait, including () would then give trouble extracting (http://example.org/).
OK, maybe never mind this bug, and blame the user for not using %28, etc.