Freron MailMate

The warning (red) tooltip sometimes shows up with URLs containing tildes (~)

This happens under (as far as I can find) two circumstances:

1. URL not written up in Markdown.
   
2. URL written up in Markdown, with the text part of the Markdown containing a colon.

Notes:

• This shows in both the edit window and in the main MailMate window when it’s viewed as a draft.
• The warning appears in both right and bottom oriented preview layouts.
• Markdown footnotes are unaffected.
• I think this is probably due to a mismatch between the URL as typed and the URL encoding of the tilde character.

Steps to reproduce:

1. Create a new email.
   

2. Paste in the following:

   1. [example](http://example.org/~1)
   2. [http://](http://example.org/~2)
   3. [:](http://example.org/~3)
   4. http://example.org/~
   5. http://example.org/~test
   6. example[1]
   
   [1]: http://example.org/~
   

3. If the preview hasn’t automatically appeared, toggle it on.

4. Hover over each of the URLs in turn, you will notice URLs 2-5 cause a red warning tooltip to appear.