*: --help text tweaks

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/coreutils/fold.c b/coreutils/fold.c
index 1e26dde..98c3b14 100644
--- a/coreutils/fold.c
+++ b/coreutils/fold.c
@@ -23,7 +23,7 @@
 //usage:#define fold_trivial_usage
 //usage:       "[-bs] [-w WIDTH] [FILE]..."
 //usage:#define fold_full_usage "\n\n"
-//usage:       "Wrap input lines in each FILE (or stdin), writing to stdout\n"
+//usage:       "Wrap input lines in FILEs (or stdin), writing to stdout\n"
 //usage:     "\n	-b	Count bytes rather than columns"
 //usage:     "\n	-s	Break at spaces"
 //usage:     "\n	-w	Use WIDTH columns instead of 80"