Convert line breaks from DOS to UNIX

[seisman]

Description of proposed changes

It seems @willschlitzer is developing PyGMT under Windows, and the new
files he created have DOS-style line breaks.

To keep the consistency in the whole project, I convert all these files
to UNIX-style line breaks using dos2unix. I don't know how git
and github handles line breaks, but I can't see the changes
in the diff view.

I also removed the x permission of these files.

Perhaps we also need a style check for line breaks?

Reminders

• Run make format and make check to make sure the code follows the style guide.
• Add tests for new features or tests that would have caught the bug that you're fixing.
• Add new public functions/methods/classes to doc/api/index.rst.
• Write detailed docstrings for all functions/methods.
• If adding new functionality, add an example to docstrings or tutorials.

Notes

• You can write /format in the first line of a comment to lint the code automatically

[willschlitzer]

Not sure on what's causing this; I'm using PyCharm Professional on Ubuntu 20.04

[weiji14]

Wow, good catch, would not have spotted that. Could you add the style check in this PR too if it's not too much work?

@willschlitzer, try https://www.jetbrains.com/help/pycharm/configuring-line-endings-and-line-separators.html

[weiji14]

So, chicken and egg question, do we merge this PR first, or #736 with the new style check?

Also, should we have a style check for ensuring there's no executable 'x' permissions (755)?

[seisman]

So, chicken and egg question, do we merge this PR first, or #736 with the new style check?

We can merge this PR first, and then #736.

Also, should we have a style check for ensuring there's no executable 'x' permissions (755)?

Sounds a good idea.