If the `four_space_rule` extension is not enabled,
figure out the indentation needed for child blocks dynamically,
by looking at the first nonspace content after the `:` marker.
Previously the four-space rule was always obeyed.
Remove the old `compact_definition_lists` extension. This was
neded to preserve backwards compatibility after pandoc 1.12
was released, but at this point we can get rid of it.
T.P.Extensions: remove `Ext_compact_definition_lists` constructor
for `Extension` [API change].
Fix tight/loose detection for definition lists, to conform to
the documentation.
Closes#10889.
In commit a26ec96d89 we added an
empty `\item[]` to the beginning of a list that occurs first
in a definition list, to avoid having one item on the line with
the label.
This gave bad results in some cases (#10241) and there is a more
idiomatic solution anyway: using `\hfill`.
Closes#10241.
When a list occurs at the beginning of a definition list definition,
it can start on the same line as the label, which looks bad.
Fix that by starting such lists with an `\item[]`.
John MacFarlane