add a test showing that you can write use fn

src/lib.rs

@@ -316,7 +316,7 @@ macro_rules! query_group {
         @query_fn[
             storage(input);
             method_name($method_name:ident);
-            fn_path($($fn_path:tt)+);
+            fn_path($fn_path:path);
             $($rest:tt)*
         ]
     ) => {

tests/macros.rs

@@ -0,0 +1,14 @@
+salsa::query_group! {
+    trait MyDatabase: salsa::Database {
+        fn my_query(key: ()) -> () {
+            type MyQuery;
+            use fn another_module::another_name;
+        }
+    }
+}
+
+mod another_module {
+    pub(crate) fn another_name(_: &impl crate::MyDatabase, (): ()) -> () {}
+}
+
+fn main() {}