PR: Fix __init__ of widgets that inherit from SpyderWidgetMixin for PyQt5

[ccordoba12]

Description of Changes

• This problem was introduced by PR: Make Spyder compatible (for the most part) with PySide2 #16322.
• This PR also fixes mixed line endings in several files, which was introduced in PR: Make Spyder compatible (for the most part) with PySide2 #16322.

Affirmation

By submitting this Pull Request or typing my (user)name below,
I affirm the Developer Certificate of Origin
with respect to all commits and content included in this PR,
and understand I am releasing the same under Spyder's MIT (Expat) license.

I certify the above statement is true and correct: @ccordoba12

[pep8speaks]

Hello @ccordoba12! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file spyder/plugins/outlineexplorer/widgets.py:

Line 736:80: E501 line too long (82 > 79 characters)

Comment last updated at 2021-10-17 19:28:13 UTC