[BUG][Go] Badly formated enum name

Description

Shared type is incorrectly formated (snake_case instead of camel case) and results in a non-exported type where it's properly camel_cased in other part of the code

openapi-generator version

4.3.0-Snapshot (latest docker image)

OpenAPI declaration file content or url

Steps to reproduce

Run the command above

Output

package openapi

type d string

// List of d
const (
	A D = "A"
	B D = "B"
)

Expected output

package openapi

type D string

// List of d
const (
	A D = "A"
	B D = "B"
)

Suggestion

Most probably a type writing function is missing a casing, it ca be worked around by using camel case in the specification.

Start with the supplied OpenAPI declaration and run the generate command using -g go-server to reproduce the generated enum. Trace where the shared schema name is converted into the Go type name, then verify the generated output declares and references the exported type consistently.