Problem with mom's .PDF_WWW_LINK macro

[T. Kurt Bond]

Here's a mom source file I cut down from contrib/mom/examples/mom-pdf.mom
in the groff distribution, from a very recent git pull.

.PAPER Letter
.PRINTSTYLE TYPESET
.TITLE "Testing mom's PDF_WWW_LINK macro"
.char \[pdfmom]           \*[BD]pdfmom\*[PREV]
.char \[-P-p<papersize>]  \*[BD]\-P\-p<papersize>\*[PREV]
.char \[-Tpdf]            \*[BD]\-Tpdf\*[PREV]
.START
.PP
One reason to prefer using the native PDF driver (via \[pdfmom] or
\[-Tpdf]) is that papersizes set within mom source files (see
.PDF_WWW_LINK
http://www.schaffter.ca/mom/momdoc/typesetting.html#page-setup-intro SUFFIX
) \
  "paper and page setup macros"
do not require a corresponding \[-P-p<papersize>] flag on the
command line.

In the PDF file I generated from this (attached to this message) the URL in
the link is:

http://www.schaffter.ca/mom/momdoc/typesetting.html%23page-setup-intro

Notice the "%23" instead of the "#"?  Following this link results in a 404
error.

Why did this happen?

groff --version reports "GNU groff version 1.23.0.rc1.340-0dab6".
-- 
T. Kurt Bond, tkurtbond@gmail.com, https://tkurtbond.github.io

mom-link.pdf
Description: Adobe PDF document