This is necessary as the latex citation commands include there own
punctuation, which resulted in doubled commas for markdown documents
where citeproc output works correctly.
Now we handle a suffix after a bare locator, e.g.
@item1 [p. 30, suffix]
The suffix now includes any punctuation that introduces it.
A few tests fail because of problems with citeproc (extra space
before the suffix, missing space after comma separating multiple
page ranges in the locator).
Suffixes and prefixes are now [Inline]. The locator is separated
from the citation key by a blank space. The locator consists of
one introductory word and any number of words containing at
least one digit. The suffix, if any, is separated from the locator
by a comma, and continues til the end of the citation.
