Add parser support for semicolons after annotation, fixes #54280

modules/gdscript/gdscript_parser.cpp

@@ -1418,6 +1418,8 @@ GDScriptParser::AnnotationNode *GDScriptParser::parse_annotation(uint32_t p_vali
 	}
 
 	match(GDScriptTokenizer::Token::NEWLINE); // Newline after annotation is optional.
+	while (match(GDScriptTokenizer::Token::SEMICOLON))
+		; // Semicolons after annotation are optional.
 
 	if (valid) {
 		valid = validate_annotation_arguments(annotation);

modules/gdscript/tests/scripts/parser/features/single_line_class_statements.gd

@@ -0,0 +1,6 @@
+#GDTEST_OK
+
+pass;var x;@export;@onready;;;var y : float;pass
+
+func test():
+	pass

modules/gdscript/tests/scripts/parser/features/single_line_class_statements.out

@@ -0,0 +1 @@
+GDTEST_OK