--- a/doc/interpreter/contrib.txi	Tue Dec 03 22:32:52 2013 +0100
+++ b/doc/interpreter/contrib.txi	Tue Dec 03 20:54:30 2013 -0800
@@ -134,7 +134,7 @@
 # attach ../nasty2.diff to your bug report
 @end example
 
-Mercurial has a more useful extensions that really should be enabled.
+Mercurial has a few more useful extensions that really should be enabled.
 They are not enabled by default due to a number of factors
 (mostly because they don't work in all terminal types).
 

--- a/doc/interpreter/install.txi	Tue Dec 03 22:32:52 2013 +0100
+++ b/doc/interpreter/install.txi	Tue Dec 03 20:54:30 2013 -0800
@@ -237,6 +237,10 @@
 GNU Linear Programming Kit (@url{http://www.gnu.org/software/glpk}).
 GPLK is required for the function @code{glpk}.
 
+@item gl2ps
+OpenGL to PostScript printing library (@url{http://www.geuz.org/gl2ps/}).
+gl2ps is required for printing when using the FLTK toolkit.
+
 @item gnuplot
 Interactive graphics program (@url{http://www.gnuplot.info}).  gnuplot
 is currently the default graphics renderer for Octave.
@@ -285,7 +289,7 @@
 @item Qt
 GUI and utility libraries (@url{}).  Qt is required for building the GUI.
 It is a large framework, but the only components required are the GUI,
-core, WebKit, and network modules.
+core, and network modules.
 
 @item SuiteSparse
 Sparse matrix factorization library