diff -up tcsh-6.15.00/tcsh.man.set tcsh-6.15.00/tcsh.man
--- tcsh-6.15.00/tcsh.man.set	2008-09-03 11:43:55.000000000 +0200
+++ tcsh-6.15.00/tcsh.man	2008-09-03 11:43:55.000000000 +0200
@@ -3213,7 +3213,6 @@ The fifth form sets the \fIindex\fR'th c
 this component must already exist.
 The sixth form lists only the names of all shell variables that are read-only.
 The seventh form makes \fIname\fR read-only, whether or not it has a value.
-The second form sets \fIname\fR to the null string.
 The eighth form is the same as the third form, but
 make \fIname\fR read-only at the same time.
 .PD