Document the "printable" and "punctuation" constants added to the string
module.
diff --git a/Doc/lib/libstring.tex b/Doc/lib/libstring.tex
index 6abcd13..82b96a1 100644
--- a/Doc/lib/libstring.tex
+++ b/Doc/lib/libstring.tex
@@ -37,6 +37,17 @@
The string \code{'01234567'}.
\end{datadesc}
+\begin{datadesc}{punctuation}
+ String of \ASCII{} characters which are considered punctuation
+ characters in the \samp{C} locale.
+\end{datadesc}
+
+\begin{datadesc}{printable}
+ String of characters which are considered printable. This is a
+ combination of \constant{digits}, \constant{letters},
+ \constant{punctuation}, and \constant{whitespace}.
+\end{datadesc}
+
\begin{datadesc}{uppercase}
A string containing all the characters that are considered uppercase
letters. On most systems this is the string