fix(formatter): keep newline before semicolon in the previous statement

[siketyan]

Summary

Fixes #6029

The Automatic Semicolon Insertion (ASI) has some exceptions where we need to put a semicolon anyway to disambiguate the syntax. When we prefer to use ASI and omit semicolons if possible, we put a required semicolon just before the next statement.

In this case, the text range of the previous statement ends at the semicolon we put. Then the distance of two statements will be zero, which leads the intended newline to be removed incorrectly.

To fix this issue, the formatter of JsExpressionStatement now measures the distance between the semicolon and the previous token of the semicolon and writes a newline if the distance is greater than one line.

Test Plan

Added a snapshot test.

[codspeed-hq]

CodSpeed Performance Report

Merging #6048 will not alter performance

_{Comparing siketyan:fix/GH-6029 (46defdb) with main (6908606)}

Summary

✅ 95 untouched benchmarks

[Conaclos]

LGTM :)

[chansuke]

lgtm