Mishandling of requirements.txt

[siwelwerd]

Python allows users to specify extras in a requirements.txt, e.g. pretext[prefigure] == 2.36.0. However, when the CLI checks for the version of PreTeXt, it throws a warning. I believe the problem is that this line is not general enough.

pretext-cli/pretext/utils.py

Line 137 in 9b94881

if ("pretext ==" in line) or ("pretextbook ==" in line):