Add a test

Author: matklad

crates/ra_assists/src/handlers/merge_imports.rs

@@ -179,6 +179,24 @@ use std::{fmt::Debug, fmt<|>::Display};
 ",
             r"
 use std::{fmt<|>::{Display, Debug}};
+",
+        );
+    }
+
+    #[test]
+    fn removes_just_enough_whitespace() {
+        check_assist(
+            merge_imports,
+            r"
+use foo<|>::bar;
+use foo::baz;
+
+/// Doc comment
+",
+            r"
+use foo<|>::{bar, baz};
+
+/// Doc comment
 ",
         );
     }