Spelling.

git-svn-id: https://svn.r-project.org/R/trunk@87960 00db46b3-68df-0310-9c12-caf00c1e9a41

Author: hornik

doc/NEWS.Rd

@@ -281,7 +281,7 @@
       \file{config.site}.
 
       \item \command{configure} is now able to find an external
-      \code{libintl} on macOS (the code from an older GNU gettext
+      \code{libintl} on macOS (the code from an older GNU \I{gettext}
       distribution failed to try linking with the macOS Core Foundation
       framework).
     }

src/library/tools/man/xgettext.Rd

@@ -60,10 +60,10 @@ xgettext2pot(dir, potFile, name = "R", version, bugs)
   if \code{asCall} is false.
 
   \code{xgettext2pot} calls \code{xgettext} and then \code{xngettext},
-  and writes a PO template file (to \code{potFile}) for use with the GNU gettext
+  and writes a PO template file (to \code{potFile}) for use with the GNU \I{gettext}
   tools.  This ensures that the strings for simple translation are
-  unique in the file (as GNU gettext requires), but does not do so
-  for \code{ngettext} calls (and the rules are not stated in the GNU gettext
+  unique in the file (as GNU \I{gettext} requires), but does not do so
+  for \code{ngettext} calls (and the rules are not stated in the GNU \I{gettext}
   manual, but \command{msgfmt} complains if there is duplication between
   the sets.).