add space to list of invisible commands

example.tex

@@ -299,6 +299,7 @@
 				3/4 non-breaking space & \lstinline|\;| & 10\;000 (separate thousands)\\
 				medium non-breaking space & \lstinline|\:| & z.\:B. (abbreviations) \\
 				1/2 non-breaking space & \lstinline|\,| & 1\,V (number + unit) \\
+				normal space & \lstinline|\space| & in case some command eats up all your space \\
 			\end{tabular}