Add inline example for grdview

[willschlitzer]

Addresses #1957

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 commands are:

• /format: automatically format and lint the code
• /test-gmt-dev: run full tests on the latest GMT development version

[seisman]

Ping @willschlitzer to see if you have time to finish this PR before the v0.9.0 release.

[seisman]

It's likely that Will is busy recently, so I'm taking over this PR to make sure that we can have it done before v0.9.0.

[willschlitzer]

Hey, sorry that I've been MIA; I should have time to work on things this week, but no problem with @seisman making changes/approving things.

[seisman]

Hey, sorry that I've been MIA; I should have time to work on things this week, but no problem with @seisman making changes/approving things.

Don't worry. Welcome back.

[yvonnefroehlich]

Hm. Just wondering whether we should decide about starting comments with either upper-case letters or with lower-case letters, across all examples? I have a little preference towards upper-case letters, but I am also totally fine with the lower-case option 🙂.

[seisman]

Hm. Just wondering whether we should decide about starting comments with either upper-case letters or with lower-case letters, across all examples? I have a little preference towards upper-case letters, but I am also totally fine with the lower-case option slightly_smiling_face.

Either is fine to me.