Improved Elixir Atom Generation

[drewble]

• Refine the regular expression for atoms

The current regex incorrectly matches @atom (unquoted atoms cannot begin with @). However, through testing with iex, it also turns out that the atom :@ is legal.

The following atoms will now be quoted that would have been incorrectly not quoted:

• :"@type"

@mrmstn

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[wing328]

@drewble thanks for the PR

I just merged #20236 to create a seaprate spec to test Elixir client generator.

Can you please merge the latest into your branch and add a test or 2 in the test spec(modules/openapi-generator/src/test/resources/3_0/elixir/petstore-with-fake-endpoints-models-for-testing.yaml), and then regenerate the samples?

[drewble]

@wing328 I believe I have completed the updates as requested, with additions to the test spec, and an additional ExUnit test for the new Any model containing a quoted atom key.

[wing328]

tested locally and the result is good

Compiling 1 file (.ex)
Generated openapi_petstore app
Running ExUnit with seed: 226276, max_cases: 16

...........
Finished in 0.2 seconds (0.2s async, 0.00s sync)
11 tests, 0 failures
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  9.616 s
[INFO] Finished at: 2024-12-06T14:25:20+08:00
[INFO] ------------------------------------------------------------------------