Text causes MMMarkdown to hang

[ghost]

The below text causes MMMarkdown to hang or at least take an extremely long time to complete. I've not been able to reliably pin down the actual part of the text that causes the problem BUT if you delete the first line, the issue does not repro. If you delete everything after the first line, the issue does not report. So some combination of the first line and the body that follows is causing an issue. (Note that the 'dots' here are asterisks in the original text).

1.20.526

• Added Set Signature/Delete Signature to editor popup menu. Simply type a signature, highlight and right
  click on the text and choose Set Signature to make that text your signature.
• Added Read-Lock on messages. Press 'L' to set a locked, unread, flag on the current message.
• Add Install Script to system menu to install CIXReader script packages.
• Can now close a profile window with Esc or Ctrl+F4.
• Can now override mugshots by putting a replacement image in the Mugshots folder in the CIXReader data
  folder with the username as the filename.
• Support Ctrl+K to mark the current topic read.
• Fix a bug where some messages didn't scroll into view when selected.
• Fix a bug where backtracking missed some messages.
• Added more shortcut keys to dialogs for improved accessibility.
• Added F5 to invoke the system menu.
• Improvements for running CIXReader on high DPI displays.
• Add IndentationOffset configuration option in ini file for adjusting indentation in thread list.
• Expanded the Keyboard Help dialog.