update elements and fix some bugs

lib/src/prism/tests/languages/latex/headline_feature.test

Index: lib/src/prism/tests/languages/latex/headline_feature.test
diff --git a/lib/src/prism/tests/languages/latex/headline_feature.test b/lib/src/prism/tests/languages/latex/headline_feature.test
new file mode 100644
index 0000000000000000000000000000000000000000..17102ad1d7937f9872e6cf1bd3e325d523487bb4
--- /dev/null
+++ b/lib/src/prism/tests/languages/latex/headline_feature.test
@@ -0,0 +1,39 @@
+\part{Foobar}
+\chapter{Foobar}
+\section{Foobar}
+\subsection{Foobar}
+\frametitle{Foobar}
+\subsubsection{Foobar}
+\paragraph{Foobar}
+\subparagraph{Foobar}
+\subsubparagraph{Foobar}
+\subsubsubparagraph{Foobar}
+
+----------------------------------------------------
+
+[
+	["function", "\\part"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\chapter"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\section"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\subsection"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\frametitle"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\subsubsection"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\paragraph"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\subparagraph"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\subsubparagraph"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"],
+	["function", "\\subsubsubparagraph"], ["punctuation", "{"],
+	["headline", "Foobar"], ["punctuation", "}"]
+]
+
+----------------------------------------------------
+
+Checks for headlines.