{.quotelead} strings in markdown2html messages

[Cameron Simpson]

On 29Jun2021 20:36, Aitor Soroa <aitors2005 at gmail.com> wrote:
>I am a big fan of the markdown2html script (in contrib), which allows 
>me to write messages in markdown format. The script converts the message into html
>and mutt sends them as attachments.
>
>However, lately the script writes strange `{.quotelead}` strings, as can be
>seen in the recipe below. I'd rather get rid of those, but unfortunately
>i don't know how. Any help in this regard would be much appreciated!

Just looking at my local copy of this script (which don't use), it has a 
pretty obvious bug.

The string quotelead occurs in 3 places:

In some CSS included with the message:

    .quotelead {
        font-style: italic;
        margin-bottom: -1em;
        color: #999;
        font-size: 80%;
    }

In the generate_lines_with_context function, which has this little 
snippet:

    for prev, cur, nxt in generate_lines_with_context(mdwn):
        # The lead-in to a quote is a single line immediately preceding 
        # the
        # quote, and ending with ':'. Note that there could be multiple 
        # of
        # these:
        if re.match(r'^.+:\s*$', cur) and nxt.startswith('>'):
            ret.append(f'{{.quotelead}}{cur.strip()}')
            # pandoc needs an empty line before the blockquote, so
            # we enter one for the purpose of HTML rendition:
            ret.append('')
            continue

and in some post processing:

    def _reformat_quotes(html):
        '''
        Earlier in the pipeline, we marked email quoting, using markers, which we
        now need to turn into HTML classes, so that we can use CSS to style them.
        '''
        ret = html.replace('<p>{.quotelead}', '<p class="quotelead">')
        ret = re.sub(r'<blockquote>\n((?:<blockquote>\n)*)<p>(?:\{\.quote(\w+)\})',
                     r'<blockquote class="quote \g<2>">\n\g<1><p>', ret, flags=re.MULTILINE)
        return ret

The issue is that it is looking for this:

    <p>{.quotelead}

to replace it with this:

    <p class="quotelead">

to access the CSS, but the generated text just puts:

    {.quotelead}stripped-line-of-text

into the message. So no match.

Try hacking the script to change this:

    ret.append(f'{{.quotelead}}{cur.strip()}')
    ret.append(f'<p>{{.quotelead}}{cur.strip()}')

That might make for ugly HTML rendering, but would at least the litter 
will be gone.

Cheers,
Cameron Simpson <cs at cskk.id.au>