Re: Fwd: fill-paragraph puts one useless blank at the end of many Chinese big5 lines

[Kenichi Handa <handa@m17n.org>]

In article <87ist78n65.fsf@jidanni.org>, Dan Jacobson <jidanni@dman.ddts.net> writes:
>>>>>>  "S" == Stefan Monnier <monnier+gnu/emacs@rum.cs.yale.edu> writes:
>>>  fill-paragraph puts one useless blank at the end of many of these
>>>  Chinese big5 lines here in locale zh_TW.Big5 when I set fill-column to
>>>  16 or 17 etc. I uuencoded the sample input:

S>  It's done on purpose (in fill-newline):

S>    (if (and (= (following-char) ?\ )
S>  	   (or (aref (char-category-set (preceding-char)) ?|)
S>  	       (looking-at "[ \t]+\\c|")))
S>        ;; We need one space at end of line so that
S>        ;; further filling won't delete it.  NOTE: We
S>        ;; intentionally leave this one space to
S>        ;; distinguish the case that user wants to put
S>        ;; space between \c| characters.
S>        (forward-char 1))

> Well, whatever... except that I now see them with (setq-default
> show-trailing-whitespace t) and my thrifty genes say they must go.
> Plus it's not very environmentally conscious [uses disk space].  And,
> it may very well have effects beyond what you thought.  And, if I must
> clean it up afterwards, you should do it for me before I see it.  And,
> it looks sloppy.

Perhaps, by adding some text property to such newlines that
replaces white spaces between \c| characters, we can avoid
leaving those spaces.

Stefan, what do you think?  Currently I myself don't have a
time to work on fill.el (it seems that the file has been
widely changed since I wrote the above code).  Could you
work on it?  Otherwise, I'll put this matter in my TODO
list.

---
Ken'ichi HANDA
handa@m17n.org