format can change multiline strings

[pdewacht]

rescript format (12.3.0) will change this code:

let oops // comment
= "
multiline
"

into:

let oops = " // comment
multiline
"

[fhammerschmidt]

Thanks for reporting!
This appears to be not a regression. It existed at least since 10.1.2 (oldest ReScript playground version).