Update tests.
Reason: it turns out that the native output generated by
pretty-simple isn't always readable by the native reader.
According to https://github.com/cdepillabout/pretty-simple/issues/99
it is not a design goal of the library that the rendered values
be readable using 'read'. This makes it unsuitable for our
purposes.
pretty-show is a bit slower and it uses 4-space indents
(non-configurable), but it doesn't have this serious drawback.
Previously we used our own homespun formatting. But this
produces over-long lines that aren't ideal for diffs in tests.
Easier to use something off-the-shelf and standard.
Closes#7580.
Performance is slower by about a factor of 10, but this isn't
really a problem because native isn't suitable as a serialization
format. (For serialization you should use json, because the reader
is so much faster than native.)
Starting with pandoc 2.4, citations and quoted inlines
were no longer recognized after parentheses. This is
because of commit 9b0bd4ec6f,
which is reverted here.
The point of that commit was to allow relocation of
soft line breaks to before an abbreviation, so that
a nonbreaking space could be added after the
abbreviation. Now we simply leave the soft line
break in place, even though this means that
we won't get a nonbreaking space after "Mr."
at the end of a line (and in LaTeX this may
result in a longer intersentential space).
Those who care about this issue should take care
not to end lines with an abbreviation, or to
insert nonbreaking spaces manually.
Closes#5099.
