rustdoc: Add a custom callback for codespan to collapse whitespace

Because the current style for `code` in rustdoc is to prewrap
whitespace, code spans that are hard wrapped in the source
documentation are prematurely wrapped when rendered in HTML.

CommonMark 0.18 [[1]] specifies "interior spaces and line endings are
collapsed into single spaces" for code spans, which would actually
prevent this issue, but hoedown does not currently conform to the
CommonMark spec.

The added span-level callback attempts to adhere to how whitespace is
handled as described by CommonMark, fixing the issue of early,
unintentional wrapping of code spans in rendered HTML.

[1]: http://spec.commonmark.org/0.18/

0 files changed, 0 insertions, 0 deletions