Extra underscore for an enum variant named `replace`

[xu-cheng]

Describe the bug
There is an extra underscore if I have an enum including a variant named replace.

To Reproduce

Example schema:

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "title": "Action",
    "enum": [
        "append",
        "prepend",
        "replace"
    ]
}

Used commandline:

$ datamodel-codegen \
    --input-file-type jsonschema \
    --output-model-type pydantic_v2.BaseModel \
    --capitalise-enum-members \
    --input test.json \
    --output test.py

Expected behavior

What I want to get:

class Action(Enum):
    APPEND = 'append'
    PREPEND = 'prepend'
    REPLACE = 'replace'

What I actually got, noted that extra _ in REPLACE_.

class Action(Enum):
    APPEND = 'append'
    PREPEND = 'prepend'
    REPLACE_ = 'replace'

Version:

• OS: Linux
• Python version: 3.12
• datamodel-code-generator version: 0.53.0