Fantomas removes backticks around constraint

[Tarmil]

Issue created from fantomas-online

Code

let ``constraint`` = 1

Result

let constraint = 1

Problem description

The identifier constraint is marked as a possible future keyword and raises a warning. It should remain escaped by double-backticks.

Extra information

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

Options

Fantomas master branch at 1/1/1990

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?}

[nojaf]

Hello @Tarmil, thank you for reporting this problem.
This looks similar to #2034, which should be fixed at dotnet/fsharp#12303 if you are interested.