For command line examples in the documentation, use "python" rather than "python3"

[furkanonder]

Linked PRs

• gh-100972: For command line examples in the documentation, use "python" rather than "python3" #100973

[hugovk]

Note: similar to #98763.

[rhettinger]

On my Mac, python no longer refers to an executable. Only python3 works. So, at least for Mac Users, the status quo is better. With the proposed substitutions, the examples won't work any more.

[erlend-aasland]

Closing this; see #100973 (comment) for my explanation.