Fix a preexisting grammar issue in text taken from queue.3.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
.PP
In the macro definitions,
.I TYPE
-is the name of a user defined structure,
+is the name of a user-defined structure,
that must contain a field of type
.IR LIST_ENTRY ,
named
.IR NAME .
The argument
.IR HEADNAME
-is the name of a user defined structure that must be declared
+is the name of a user-defined structure that must be declared
using the macro
.BR LIST_HEAD ().
.PP