w3m -halfdump for <ul><li>... returns NBSP instead of SP

[tats]

Quoting from [emacs-w3m:12613] http://emacs-w3m.namazu.org/ml/msg12505.html:

From: Katsumi Yamaoka
Date: Thu, 22 Dec 2016 11:05:16 +0900

Recently some unprintable characters got appearing in a web page
rendered by emacs-w3m. I am using w3m/0.5.3+git20161220 .
An example html snippet is below, and here's a simplified recipe:

echo '<ul><li>foo</ul>'| w3m ARGLIST
 => ??<_SYMBOL TYPE=32>*</_SYMBOL>?foo

Where `?' is NBSP (0xa0), that was SPC (0x20) till the middle of
December. ARGLIST is a list of arguments (emacs-w3m generates)
that includes:

-halfdump -o ext_halfdump=1 -o strict_iso2022=0
-o fix_width_conv=1 -o use_jisx0201=0 -o ucs_conv=1
-I UTF-8 -O UTF-8 -T text/html -t 8 -cols 79
-o display_ins_del=2 -o display_image=on -ppl 64 -ppc 8

[tats]

Fixed.