New environment for non-normative content without delimiting paragrap…

…h breaks

When using the nonnormative* environment, it is the author's responsibility to ensure that the content doesn't mix with other paragraphs.  The main use at the moment is in tables, where there shouldn't be a paragraph break before the line break at the end of a table row.

preamble.tex

@@ -89,12 +89,22 @@
 \renewcommand{\labelenumiii}{\labelenumii\arabic{enumiii}.}
 \renewcommand{\labelenumiv}{\labelenumiii\arabic{enumiv}.}
 
-% Non-normative content
+% Non-normative content without paragraph breaks at beginning and end.
+% In most cases, one should use the 'nonnormative' environment instead.
+\newenvironment{nonnormative*}[0]{%
+{[}\itshape\ignorespaces
+}{%
+\unskip\upshape{]}%
+}
+
+% Non-normative content with paragraph breaks at beginning and end.
 \newenvironment{nonnormative}[0]{%
-\par{[}\itshape\ignorespaces
+\par\begin{nonnormative*}%
 }{%
-\unskip\upshape{]}\par%
+\end{nonnormative*}\par%
 }
+
+% Example environment, as a special case of non-normative content.
 \newenvironment{example}[0]{%
 \begin{nonnormative}Example:
 }{%