Comments written with the first two letters as capitals are formatted like todo-comments. Se attatched screenshot for example.
MWE:
\documentclass[10pt,a4paper]{article}
\usepackage[latin1]{inputenc}
\usepackage{todonotes}
\title{Test}
\begin{document}
%example
%EXample
\todo{example}
\end{document}
this is intentional
This is intentional: see [feature-requests:#967].
Related
Feature Requests:
#967