Improve lore2sphinx buildbot results for `projects/core/howto/cred.xhtml`

[exarkun]

like #4566, except for the cred howto

[exarkun]

(In [30676]) Branching to 'cred-sphinx-4872'

[exarkun]

(In [30677]) Merge the cred parts of the impossibly huge #4568 branch

refs #4568 refs #4872

[moshez]

There is a move of newline from before "is" (in "the mind is") to after it, and a couple of trailing spaces. Why is that?

[exarkun]

To fix the generated ReST markup.

[lvh]

There are three changes in this diff. The first two produce  broken output, the last one is fine.

1. put "is" on the next line, problem is missing space, resulting in None not being monospace (generated reST: Typically you only pass in one interface, and the mind is``None``)
2. putting *interfaces in <code> tags, converter doesn't add backticks, Sphinx somehow manages to interpret the result as a link (???) (generated reST: which was one of the interfaces passed in the *interfaces tuple)
3. something about myapp_plugins.py, which works fine

This is impossible to fix in the conversion script, so this Sphinx file requires manual intervention. Neither change is particularly hard: one space and two pairs of backticks.

[lvh]

We're merging this anyway. See #4940 for actually fixing the problems in the last comment.

[lvh]

(In [31003]) Merge cred.xhtml changes from cred-sphinx-4872.

Author: screwtape, jdb Reviewer: lvh Fixes: #4872 "Makes Sphinx looks gooder." -- JP

There are problems left, for which there is #4940.