Fix Unit Tests

[YDX-2147483647]

Quote in headingWithPipes.md

Previous unit test headingWithPipes fails because of the quote.

The HTML generated by Jekyll in _site/:

<li>Doesn’t</li>

<!-- /// -->

<li>Doesn&#8217;t</li>

(It's more complicated in original version. I manually edit the HTML file to this.)

What tests.py thinks:

ACTUAL: <li>Doesn&#37413;&#27291; Exist</li>
EXPECT: <li>Doesn&#8217;t Exist</li>

If I add encoding='utf-8' when opening files in tests.py, it becomes OK. (python open() with GBK by default on Windows 10 Chinese ver. — It depends on locale.) Therefore, this might be a platform-dependent issue, and do not imply toc.html or Jekyll works wrongly.

So I remove the quote.

Python 2.7 in Contributing Guide

Change the python version from 2.7 to 3 in contributing guide. I think it was a mistake.

Details on the Python Version

The contributing guide says

run the Python script (requires 2.7)

In tests.py, there's even f-string (a python 3.6 feature)!

jekyll-toc/tests.py

Line 18 in 8d5aafd

print(f">> Invalid XML in {test_file}")

I run tests.py in python 3.7 - 3.10, and all works. (python 2.7 and 3.6 are both end-of-life)

[allejo]

Encodings strike again! 🤦 Thank you for the change on making the test more robust and for correcting the CONTRIBUTING, this was in fact, incorrect.