[BUG] spaces missing from type hints in generated ocaml code

[bobpoekert]

Description

Running the ocaml code generator generates code that fails to build because spaces have been removed from type declarations that should have space. Eg: string option becomes stringoption

openapi-generator version

Both git master and 4.3.1 release

OpenAPI declaration file content or url

https://github.com/stripe/openapi/blob/master/openapi/spec3.yaml, though I'm sure a simpler spec would also fail

[wing328]

Thanks @Zomzog for filing a fix (#7742)

@bobpoekert can you please also review the fix when you've time?

[cgensoul]

The fix is fine and legit, you can merge it @wing328. Please not that it is not enough to generate compilable code from the https://github.com/stripe/openapi/blob/master/openapi/spec3.yaml though but it still one step closer.

[wing328]

👌

We can consider using https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml to generate the OCaml client and test it in the CI.