fix: Prevent infinite loop by using custom gmatch iterator (#237)

Author: jakewvincent

lua/mkdnflow/links.lua

@@ -865,8 +865,12 @@ M.createLink = function(args)
             -- is, perform the search until a match is found whose right edge follows
             -- the cursor position
             if cursor_word ~= '' then
-                while right < col do
-                    left, right = string.find(line, cursor_word, right, true)
+                for _left, _right in utils.betterGmatch(line, cursor_word) do
+                    if _right >= col then
+                        left = _left
+                        right = _right
+                        break
+                    end
                 end
             else
                 left, right = col + 1, col