Patch #1550786: ellipsis literal.
diff --git a/Doc/lib/libconsts.tex b/Doc/lib/libconsts.tex
index a7b4498..1f56b05 100644
--- a/Doc/lib/libconsts.tex
+++ b/Doc/lib/libconsts.tex
@@ -26,6 +26,8 @@
 \end{datadesc}
 
 \begin{datadesc}{Ellipsis}
-  Special value used in conjunction with extended slicing syntax.
+  The same as \code{...}.
+  Special value used mostly in conjunction with extended slicing syntax
+  for user-defined container data types.
   % XXX Someone who understands extended slicing should fill in here.
 \end{datadesc}