Following the GAPDoc manual [1],
this should make the package names

[1] -- https://docs.gap-system.org/pkg/gapdoc/doc/chap0_mj.html
specifically Chapter 3.7, Types of Text

As instructed by Chapter 3 of GAPDoc manual,
Section 3.9.2.

Taking new lines within the string does not
propagate the new lines to the output,
unlike LaTeX.

The GAPDoc Manual contains an example GAPDoc document in Appendix A,
document title 3k+1.xml,
where the Unicode character is used directly
as opposed to the character code from HTML/XML.

This is not ideal because we should probably reuse the abstract
definition as provided to the Autodoc package.

--------------------------------

AbstractHTML is the text displayed on the package overview web page of
GAP.

AutoDoc Abstract is the text displayed on the title (home) page of digraphs.

The Autodoc package uses the GAPDoc specification for input [1],
whereas AbstractHTML, provided by GAP itself [2],
requires the string in HTML.

There may be a way to convert one to the other,
e.g. convert AutoDoc.TitlePage.Abstract from GAPDoc-formatted
into HTML-formatted string.
Possibly the converter and parser functions
ParseTreeXMLString and GAPDoc2HTML provided by GAPDoc package could be
useful.

Another thing might be AutoDoc entities, as detailed in Chapter 4 of
their manual.

[1] -- AutoDOC Reference Manual
[2] -- GAP Reference Manual, Chapter 76, Section 76.3-15: "The
PackageInfo.g File"