[3.10] Remove trailing spaces (GH-28709)

diff --git a/Objects/genericaliasobject.c b/Objects/genericaliasobject.c
index e36e0c0..dbe5d89 100644
--- a/Objects/genericaliasobject.c
+++ b/Objects/genericaliasobject.c
@@ -578,7 +578,7 @@ static PyGetSetDef ga_properties[] = {
 };
 
 /* A helper function to create GenericAlias' args tuple and set its attributes.
- * Returns 1 on success, 0 on failure. 
+ * Returns 1 on success, 0 on failure.
  */
 static inline int
 setup_ga(gaobject *alias, PyObject *origin, PyObject *args) {