Rendering a link with a space between square brackets and parens

Nobody has claimed this yet.

Right now MacDown renders `[this] (link)` as a link. But many Markdown engines (including the one in use right here on GitHub) consider the space between the square brackets `[]` and the parens `()` as significant and will not render the link unless the space is eliminated, as in `[this](link)`.

Would it be possible for MacDown to include a Markdown Preference that is something like "Allow spaces between parts of link" which is checked for the current behavior but can be unchecked if we would like MacDown to enforce the stricter behavior?

Such an option would help my users identify these spaces as errors before they upload the `.md` files to their Jekyll sites.

The issue concerns MacDown's Markdown link rendering and a user preference controlling whether spaces are accepted between link brackets and parentheses. Start by locating the rendering and preference entry points, then verify that the unchecked setting rejects `[this] (link)` while the checked setting preserves current behavior.

Written by the indexing model from the issue text.