Stop matching URLs at first closing parenthesis

[winstliu]

Requirements

• Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
• All new code requires tests to ensure against regressions

Description of the Change

Don't be overeager - stop matching URL strings at the first closing parenthesis. Fixes the case when there's multiple closing parentheses on the same line, such as one to close the url function and another to close a format function.

Alternate Designs

Changing the pattern to use a match instead of a begin/end pair. Decided to keep the change minimal.

Benefits

No more buggy highlighting when specifying a format after a URL.

Possible Drawbacks

None.

Applicable Issues

Fixes #51, supersedes and closes #54