Enum generation with strings including spaces and dashes fails

[linaouro]

Describe the bug
When running edgedb-py to create a query that includes and enum where the enum values contain spaces and/or dashes, the enum keys in the generated py source contain spaces and dashes too, leading to faulty syntax.

Reproduction
Create a query including an enum which contains spaces/dashes in their stirng values:

scalar type PROP_ENUM extending enum<"random", "some-value", "another space">;

select (insert object {
    id := <str>$id,
    some_prop := <PROP_ENUM>$some_prop,
  }
) { id, some_prop};

Generated code:

class PropEnum(enum.Enum):
    RANDOM= "random"
    SOME-VALUE= "some-value"
    ANOTHER SPACE= "another space"

Expected behavior
It should replace the spaces and dashes in the enum keys by underscores.

Versions (please complete the following information):

• OS: Ubuntu 0.04.5 LTS (Focal Fossa)
• EdgeDB version: 2.15+75c3494
• EdgeDB CLI version: 3.0.0+8b024db
• edgedb-python version: 1.3.0
• Python version: 3.10.10