This escapes the `.` preceding an extension (e.g. `.wiki`) so that it doesn't accidentally match any character. For example: `[vimwiki](vimwiki)` was opening the `vi.wiki` page, because of this rule.
This escapes the `.` preceding an extension (e.g. `.wiki`) so that it doesn't accidentally match any character. For example: `[vimwiki](vimwiki)` was opening the `vi.wiki` page, because of this rule.