Optional parameter lost backticks

[nojaf]

Issue created from fantomas-online

Code

type [<AllowNullLiteral>] ArrayBuffer =
    abstract byteLength: int
    abstract slice: ``begin``: int * ?``end``: int -> ArrayBuffer

Result

[<AllowNullLiteral>]
type ArrayBuffer =
    abstract byteLength: int
    abstract slice: ``begin``: int * ?end: int -> ArrayBuffer

Problem description

Please describe here the Fantomas problem you encountered.
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Extra information

• The formatted result breaks my code.
• The formatted result gives compiler warnings.
• I or my company would be willing to help fix this.

Options

Fantomas main branch at 2023-01-19T07:22:18Z - 959e49b

Default Fantomas configuration

_{Did you know that you can ignore files when formatting from fantomas-tool or the FAKE targets by using a .fantomasignore file?}