Revert "Update crates/ide/src/runnables.rs"

This reverts commit bf47acf.

Author: lnicola

crates/ide/src/runnables.rs

@@ -435,7 +435,8 @@ fn module_def_doctest(db: &RootDatabase, def: Definition) -> Option<Runnable> {
                             ty_args.format_with(", ", |ty, cb| cb(&ty.display(db)))
                         );
                     }
-                    return Some(format!(r#""{}::{}""#, path, def_name));
+                    format_to!(path, "::{}\"", def_name);
+                    return Some(format!("\"{}", path));
                 }
             }
         }