Catch malformed invocation input

Author: istathar

src/parsing/parser.rs

@@ -2230,7 +2230,7 @@ fn is_procedure_title(content: &str) -> bool {
 // I'm not sure about anchoring this one on start and end, seeing as how it
 // will be used when scanning.
 fn is_invocation(content: &str) -> bool {
-    let re = regex!(r"^\s*(<.+?>\s*(?:\(.*?\))?)\s*$");
+    let re = regex!(r"^\s*<");
 
     re.is_match(content)
 }

tests/parsing/errors.rs

@@ -238,4 +238,17 @@ making_coffee :
             ParsingError::ExpectedMatchingChar(43, "a function call", '(', ')'),
         );
     }
+
+    #[test]
+    fn invalid_invocation_in_repeat() {
+        expect_error(
+            r#"
+making_coffee :
+
+    1. { repeat <making_coffee }
+            "#
+            .trim_ascii(),
+            ParsingError::ExpectedMatchingChar(29, "an invocation", '<', '>'),
+        );
+    }
 }