Invalid unit test should break lines on multiline if conditions

[nojaf]

Issue created from fantomas-online

Existing test: should break lines on multiline if conditions does not produce valid F# code.
Related to #842

Code

let x = 
    if try
        true
       with 
       | Failure _ -> false 
    then ()
    else ()

Error

Fantomas was able to format the code but the result appears to be invalid F# code.
Please open an issue.

Formatted result:

let x =
    if try
        true
       with Failure _ -> false then
        ()
    else
        ()

Options

Fantomas Next - 4.0.0-alpha-001-1/1/1990

Name	Value
IndentSpaceNum	4
PageWidth	120
SemicolonAtEndOfLine	false
SpaceBeforeParameter	true
SpaceBeforeLowercaseInvocation	true
SpaceBeforeUppercaseInvocation	false
SpaceBeforeClassConstructor	false
SpaceBeforeMember	false
SpaceBeforeColon	false
SpaceAfterComma	true
SpaceBeforeSemicolon	false
SpaceAfterSemicolon	true
IndentOnTryWith	false
SpaceAroundDelimiter	true
MaxIfThenElseShortWidth	40
MaxInfixOperatorExpression	50
MaxRecordWidth	40
MaxArrayOrListWidth	40
MaxLetBindingWidth	40
MultilineBlockBracketsOnSameColumn	false
NewlineBetweenTypeDefinitionAndMembers	false
KeepIfThenInSameLine	false
StrictMode	false