Ensure annotated sample article contains escaped source

[StevenClontz]

In e.g. Figure 9.4 of the Sample Article, a < character in the "View Source" fails to be escaped as <.

[rbeezer]

The modal serialize template in pretext-common.xsl probably needs two modes (a parameter). HTML for consumption by a browser and XML for viewing as how a "text" vesion of how source should be authored.

Might be as simple a matter in the latter case to convert & to & in every single case, effectively breaking every escape sequences into a literal versions.

[kcrisman]

In e.g. Figure 9.4 <https://pretextbook.org/examples/sample-article/annotated/graphics.html#figure-tikz-electronics> of the Sample Article, a < character in the "View Source" fails to be escaped as &lt;.

I noticed that a few days ago, but assumed it was intentional. In fact, the CDATA markup also disappears currently.

[rbeezer]

In fact, the CDATA markup also disappears currently.

CDATA always goes away as part of the XML parsing. Nothing can be done about that as far as I know (except to perhaps convert it back, but you wouldn't know when it was used and when it wasn't).

And we try to de-emphasize its use. It confuses a lot of principles and a lot of people.

[kcrisman]

Got it.

And we try to de-emphasize its use. It confuses a lot of principles and a lot of people.

True! I definitely prefer the explicit &lt;

[rbeezer]

Done. Pushing up a test to the website now.

Dual-purpose template: 70658bd

And employment: 7be4de4

Good catch - thanks!