Fix broken wiki sidebar when slugs contain special characters

Himanshu Kapoorrequested to merge
486381-sidebar-regex into master

What does this MR do and why?

Fix broken wiki sidebar when slugs contain special characters

When parsing slugs using regular expressions, escape special characters first, so that if the slug contains those characters they don't break the sidebar.

Changelog: fixed

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Before After
image image

How to set up and validate locally

  1. Important: Start with an empty wiki. Perhaps create a new project first.
  2. Create a few wiki pages with special characters like emojis, parenthesis, braces and square brackets in the title.
  3. Make sure "Generate page path from title" is checked.
  4. Notice that after creating these wiki pages, the sidebar still renders correctly. This was previously broken.

Related to #486381 (closed)

Edited by Himanshu Kapoor

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