Migrate remove_dbg assist to use SyntaxEditor

[Hmikihiro]

part of #15710 and #18285

[ShoyuVanilla]

I think there are still some places to migrate left in this file, like:

rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs

Lines 51 to 53 in e9968fc

	builder.replace(range, expr.to_string());
	} else {
	builder.delete(range);

[ShoyuVanilla]

Thanks!

[lnicola]

Just FYI, I tried to update the list in #18285 (comment). A couple of them are not clear-cut though, like convert_bool_then, which was ported, but still uses clone_for_update to adjust the indent (and in one other place).

[ShoyuVanilla]

Just FYI, I tried to update the list in #18285 (comment). A couple of them are not clear-cut though, like convert_bool_then, which was ported, but still uses clone_for_update to adjust the indent (and in one other place).

I guess some of them are my faults 😅

Anyway we really need to handle whitespaces accordingly and I'll take a look into it