[AlanHK]

I have some text mimicking a report; needed to have text line up on several lines, since HTML doesnt have tabstops, only way I could think was to use a monospaced font.

so did this CSS:

.memo {
margin-top:2em;
margin-left: 2em;
text-indent:0em;
font-family: monospace;
font-size: .9em;
white-space: pre-wrap;
}

and text like:

<p class="memo">
AGENTS:
 Section Leader: Com Varlt, MW 69321
 Crew:           Horman Tilis MW 69345
                 Fal Korf AW 70958
                 Pague Lo Sig AW 70889 

PROGRESS TO DATE:
  Traced subject—Kmoat Vo Pranj—to Levels 415-426 inclusive.
</p>

And that worked perfectly. Looks as it does above with "CODE" tags.
But when I saved it, clean source collapses it to:

<p class="memo">AGENTS: Section Leader: Com Varlt, MW 69321 Crew: Horman Tilis MW 69345 Fal Korf AW 70958 Pague Lo Sig AW 70889 PROGRESS TO DATE: Traced subject—Kmoat Vo Pranj—to Levels 415-426 inclusive.</p>

Destroying the layout.

Eventually I tried using pre instead of p : <pre class="memo">
And that was safe from being reformatted.

I don't know if the pretty print can be made to check if whitespace should be preserved, but at least there is a work-around.

One reason I used p tags first was I was going to make AZW, and according to Amazon:
https://kdp.amazon.com/en_US/help/topic/A1JPUWCSD6F59O
Kindle does not support either <pre> or <tt>

But when I tried it, actually it does.
If I use Kindlegen on the <pre> coded text, Looking at the result in Calibre's Inspect, the AZW is identical: <pre class="memo">, while the KF7 has become <tt>.