Merge #10624

10624: minor: revert edition change in test r=lnicola a=lnicola

Fixes #10607 (comment)

Co-authored-by: Laurențiu Nicola <[email protected]>

Author: bors[bot]

crates/rust-analyzer/tests/slow-tests/main.rs

@@ -350,7 +350,7 @@ fn test_format_document_2018() {
 [package]
 name = "foo"
 version = "0.0.0"
-edition = "2021"
+edition = "2018"
 
 //- /src/lib.rs
 mod bar;