Remove fixme and add a missing test attribute

Author: alibektas

src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs

@@ -1789,7 +1789,6 @@ impl ExprCollector<'_> {
                 }
                 None => Pat::Missing,
             },
-            // FIXME: implement in a way that also builds source map and calculates assoc resolutions in type inference.
             ast::Pat::RangePat(p) => {
                 let mut range_part_lower = |p: Option<ast::Pat>| -> Option<ExprId> {
                     p.and_then(|it| {

src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests.rs

@@ -445,6 +445,7 @@ fn foo() {
     );
 }
 
+#[test]
 fn skip_skips_body() {
     let (db, body, owner) = lower(
         r#"