Special characters/umlauts break syntax highlighting

[lensaffair]

Prerequisites

• Put an X between the brackets on this line if you have done all of the following:
  • Reproduced the problem in Safe Mode: https://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
  • Followed all applicable steps in the debugging guide: https://flight-manual.atom.io/hacking-atom/sections/debugging/
  • Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
  • Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
  • Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

Description

Steps to Reproduce

1. Enter a todo.txt-task
2. assign a context and/or project with a special character/umlaut in it

Expected behavior:

An umlaut does not break the syntax highlighting...

Actual behavior:

...but it does.

Reproduces how often:

100%

Versions

Atom 1.58.0
language-todo 0.29.4
Windows 10 64bit

Additional Information

OS Localization: German