migrator: Fix case where users see migration banner despite no diff changes (#26982)

Smit Barmase created 9 months ago

Fixes edge case where after carrying out all migrations if final text is
same as existing text, we don't need to ask user to do anything, despite
migrations edits are being applied internally. E.g. A -> B - > C -> A

Release Notes:

- N/A

Change summary

crates/migrator/src/migrator.rs | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Detailed changes

crates/migrator/src/migrator.rs

@@ -77,7 +77,7 @@ fn run_migrations(
             result = Some(migrated_text);
         }
     }
-    Ok(result)
+    Ok(result.filter(|new_text| text != new_text))
 }
 
 pub fn migrate_keymap(text: &str) -> Result<Option<String>> {