[Groff] grohtml and non-ms macros

[Zvezdan Petkovic]

I personally use groff for PDF and PostScript documents, so I did not
care for grohtml too much.  The recent discussion about doclifter
prompted me to recheck, and it seems to be a little -ms centric.

This is a part of a paragraph from an -me document.

        .lp
        Let's look again at an $n$-bit integer
        $[ x sub n-1 , x sub n-2 , . . . , x sub 1 , x sub 0 ]$.
        It can be viewed as a bit vector $x vec$.
        One way to look at it is a binary number with $n$ digits.
        That is the
        .i unsigned
        interpretation of $x vec$:
        .EQ
        U({x vec}) = sum from i=0 to n-1 x sub i 2 sup i
        .EN

It is translated using grohtml.

        groff -I. -I/home/zvezdan/share/tmac -Iimages/inforepr -Rpte \
                -P'-s 10' -Thtml -me -mpdfmark >inforepr.html

First, if I don't define -Iimages/inforepr all images are stored in my
tmac directory (which should be really used by soelim only).
Secondly, the HTML counterpart of the above paragraph looks like this:

        <p style="margin-top: 1em" valign="top"><small>Let&rsquo;s
        look again at an
        <img src="images/inforepr-15.png" alt="Image images/inforepr-15.png">
        -bit integer
        <img src="images/inforepr-16.png" alt="Image images/inforepr-16.png">
        . It can be viewed as a bit vector
        <img src="images/inforepr-17.png" alt="Image images/inforepr-17.png">
        . One way to look at it is a binary number with
        <img src="images/inforepr-18.png" alt="Image images/inforepr-18.png">
        digits. That is the <i>unsigned</i>
        interpretation</small></p>

        <p style="margin-top: 1em" valign="top"><small>of
        <img src="images/inforepr-19.png" alt="Image images/inforepr-19.png">
        :</small></p>

        <p style="margin-left:40%;"><small><i>U</i>(
        <i><small><small><small>&rarr;</small></small></small>
        x</i>)=
        
<i><small><small>ni</small></small></i><small><small>&minus;1=0</small></small></small>
        <big>&Sigma;</big> <i><small><small>x
        <small><small>i</small></small></small></small></i>
        <small><small>2
        <i><small><small>i</small></small></i></small></small></p>

After this point all the letters are too small for comfortable reading.

Questions:
        - This is not a too complicated paragraph, yet is it broken in
          two paragraphs at "interpretation</p> <p>of".  Why?
        
        - Where five levels of <small> come from?
          (The document of 5 pages ends up with 7 <small> levels).


Best regards,

        Zvezdan


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