Parser: Fix headline extraction for the default case broken by fbca85e5

parser.cpp

@@ -31,7 +31,7 @@ std::vector<Headline> Parser::extractHeadlines(const std::string &content) const
 {
 	std::vector<Headline> result;
 
-	std::string reg = R"(\[h(1|2|3)\](\[.*?\])*(.*?)\[.*?\]*\[\/h\1\])";
+	std::string reg = R"(\[h(1|2|3)\](\[.*?\])*(.*?)(\[.*?\])*\[\/h\1\])";
 	std::regex headerfinder(reg);
 	auto begin = std::sregex_iterator(content.begin(), content.end(), headerfinder);
 	auto end = std::sregex_iterator();