Added patterns to check whether "todo" appears and lines end with

spaces. This relates to #198.

doc.zih.tu-dresden.de/util/grep-forbidden-words.sh

@@ -18,7 +18,9 @@ i	file \+system	HDFS
 i	\<taurus\>	taurus\.hrsk	/taurus	/TAURUS
 i	\<hrskii\>
 i	hpc[ -]\+da\>
-i	ATTACHURL
+i	attachurl
+i	todo	<!--.*-->
+s	 \+$
 i	\(alpha\|ml\|haswell\|romeo\|gpu\|smp\|julia\|hpdlf\|scs5\)-\?\(interactive\)\?[^a-z]*partition
 i	\[\s\?\(documentation\|here\|this \(link\|page\|subsection\)\|slides\?\|manpage\)\s\?\]
 i	work[ -]\+space"