FIXUP: Remove spaces in #error/#warning directives.

Author: burblebee

source/intro.tex

@@ -813,11 +813,11 @@
 \begin{itemize}
 \item
 shall not accept a preprocessing translation unit containing
-a \tcode{\# error} preprocessing directive\iref{cpp.error},
+a \tcode{\#error} preprocessing directive\iref{cpp.error},
 \item
 shall issue at least one diagnostic message for
-each \tcode{\# warning} or \tcode{\# error} preprocessing directive
-not following a \tcode{\# error} preprocessing directive in
+each \tcode{\#warning} or \tcode{\#error} preprocessing directive
+not following a \tcode{\#error} preprocessing directive in
 a preprocessing translation unit, and
 \item
 shall not accept a translation unit with