Add a new environment for whole-paragraph (or longer) notes & warnings.
diff --git a/Doc/doc/doc.tex b/Doc/doc/doc.tex
index 49e8c49..3e608a4 100644
--- a/Doc/doc/doc.tex
+++ b/Doc/doc/doc.tex
@@ -1010,6 +1010,25 @@
\end{macrodesc}
+ \subsection{Miscellaneous Text Markup \label{misc-text-markup}}
+
+ In addition to the inline markup, some additional ``block'' markup
+ is defined to make it easier to bring attention to various bits of
+ text. The markup described here serves this purpose, and is
+ intended to be used when marking one or more paragraphs or other
+ block constructs (such as \env{verbatim} environments).
+
+ \begin{envdesc}{notice}{\op{type}}
+ Label some paragraphs as being worthy of additional attention from
+ the reader. What sort of attention is warrented can be indicated
+ by specifying the \var{type} of the notice. The only values
+ defined for \var{type} are \code{note} and \code{warning}; these
+ are equivalent in intent to the inline markup of the same name.
+ If \var{type} is omitted, \code{note} is used. Additional values
+ may be defined in the future.
+ \end{envdesc}
+
+
\subsection{Module-specific Markup \label{module-markup}}
The markup described in this section is used to provide information