fix(fmt): write files on disk only if they're not perfect match

[grandizzy]

Motivation

Closes #6033
Closes #8769
Fixes issue reported in #8762 (comment)

Solution

• do not write files on disk if no change (ratio = 1.0)
• return false if statement empty and block doesn't fit on a single line

[zerosnacks]

Fix works! Haven't been able to replicate the issue of #8769 with this PR, even with multiple modified files

[mds1]

Does this also fix #8762 (comment)? Wondering if I should test this PR to verify

[grandizzy]

Does this also fix #8762 (comment)? Wondering if I should test this PR to verify

No, it doesn't, I'll work on it next and tag you when ready.

[mds1]

Got it, thanks :)

[grandizzy]

Got it, thanks :)

hey @mds1 I included a fix for in this PR pls see 00d1a31 The issue was related to if/else with empty statements: when prev branch didn't have any statement then the current branch was moved on a new line, pls give it a try, thank you!

[zerosnacks]

Thanks!

[mds1]

@grandizzy Confirmed that forge fmt using this PR results in no more diff, so that issue is fixed—thank you!