Add more tests

corpus/bracket_argument.txt

@@ -86,3 +86,22 @@ message(
     )
   )
 )
+
+================================
+Bracket argument with line break
+================================
+
+message([[An argument
+with line break
+]])
+
+---
+(source_file
+  (command_invocation
+    (identifier)
+    (arguments
+      (argument (bracket_argument))
+    )
+  )
+)
+

corpus/quoted_argument.txt

@@ -47,3 +47,20 @@ message("First argument" "Second argument")
     )
   )
 )
+
+=================================
+A quoted argument with line break
+=================================
+
+message("An argument
+with line break")
+
+---
+(source_file
+  (command_invocation
+    (identifier)
+    (arguments
+     (argument (quoted_argument))
+    )
+  )
+)