Fix typos in documentation and codes

[yvonnefroehlich]

Description of proposed changes

Fix some typos.
Maybe we can leave this PR open and collect any other typos until releasing v0.13.0.

Preview:

• encodings: https://pygmt-dev--3370.org.readthedocs.build/en/3370/techref/encodings.html#iso-iec-8859

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 wrapping a new module, open a 'Wrap new GMT module' issue and submit reasonably-sized PRs.
• If adding new functionality, add an example to docstrings or tutorials.
• Use underscores (not hyphens) in names of Python files and directories.

Slash Commands

You can write slash commands (/command) in the first line of a comment to perform
specific operations. Supported slash command is:

• /format: automatically format and lint the code

[seisman]

Fix some typos.
Maybe we can leave this PR open and collect any other typos until releasing v0.13.0.

Sounds good, and mark the PR as Draft to save CI resources.

[seisman]

Change "GMT" to "PyGMT"?

pygmt/doc/techref/encodings.md

Line 3 in acd80db

GMT supports a number of encodings and each encoding contains a set of ASCII and

Change

<https://en.wikipedia.org/wiki/ISO/IEC_8859>

to

[ISO/IEC_8859](https://en.wikipedia.org/wiki/ISO/IEC_8859)

pygmt/doc/techref/encodings.md

Line 111 in acd80db

<https://en.wikipedia.org/wiki/ISO/IEC_8859> for descriptions of the different parts of

and also make similar changes to following lines?

pygmt/doc/techref/encodings.md

Lines 116 to 130 in acd80db

	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-1>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-2>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-3>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-4>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-5>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-6>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-7>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-8>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-9>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-10>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-11>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-13>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-14>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-15>
	- <https://en.wikipedia.org/wiki/ISO/IEC_8859-16>

[yvonnefroehlich]

Change "GMT" to "PyGMT"?

pygmt/doc/techref/encodings.md

Line 3 in acd80db

GMT supports a number of encodings and each encoding contains a set of ASCII and

Done in commit 3483545.

Change

<https://en.wikipedia.org/wiki/ISO/IEC_8859>

to

[ISO/IEC_8859](https://en.wikipedia.org/wiki/ISO/IEC_8859)

All links are re-written in this form in commit 96fdc6d.