Un-encoded parenthesis in file paths causes inappropriate Jira Issue links

Issue Summary

When a file is referenced or attached that contains a set of characters matching a Jira issue, and a set of parenthesis is contained anywhere within the file's path or name other than the 'Jira issue' portion, the hyperlink's rendering breaks.

This is reproducible on Data Center: yes

Steps to Reproduce

1. Open up a pull request or anywhere you can submit a comment.
2. Submit a comment with the following raw text:

   • [test](this-is-a-test-TEST-123.sql) `[test](this-is-a-test-TEST-123.sql)`
     [test2](this-is-a-test-(TEST)-123.sql) `[test2](this-is-a-test-(TEST)-123.sql)` 
     [test3](#this-(is)-a-test-TEST-123.sql) `[test3](#this-(is)-a-test-TEST-123.sql)`
     [test4](#this/is/a-path-to-a-file/this-is-a-test-TEST-123.sql) `[test4](#this/is/a-path-to-a-file/this-is-a-test-TEST-123.sql)`
     [test5](#this/is/an-(important)-path-to-a-file/this-is-a-test-TEST-123.sql) `[test5](#this/is/an-(important)-path-to-a-file/this-is-a-test-TEST-123.sql)`
     [test6](#this/is/an-(important)-path-to-a-file/this-is-a-test.sql) `[test6](#this/is/an-(important)-path-to-a-file/this-is-a-test.sql)`
     

Expected Results

All of the hyperlinks are rendered correctly, and the Jira issue IDs in the code blocks next to each hyperlink are unclickable.

Actual Results

The hyperlinks for test3 and test5 are broken, and there is a clickable Jira issue link within the test's associated code block.

Workaround

Omit the offending set of parenthesis, or manually encode them when creating the path/filename in the link. (So "(" --> "%28", and ")" --> "%29")