Documentation of export is misleading

[JasonGross]

"space-separated list of variables" with an example of 'OPAMWITHTEST' suggests to me that 'foo' 'bar' would be valid, but it's a very unhelpful syntax error:

https://github.com/mit-plv/fiat-crypto/actions/runs/3206456319/workflow

[erikmd]

Hi @JasonGross, the error you raise is really a regular YAML error, I wasn't expecting that the current documentation was so misleading.
Actually, the export field should be a YAML string, containing a list (in informal sense) of space-separated shell variables.
No need for ' around each shell variable, because anyway, a variable name cannot contain a space.
So here, one can use export: "SKIP_VALIDATE COQCHKEXTRAFLAGS EXTRA_GH_REPORTIFY"

→ Do you think that the following line would be clearer in the doc?

      export: 'OPAMWITHTEST OPAMWITHDOC'  # space-separated list of variables

[JasonGross]

Yes, I think that's a better example