doc: Improve description of --files0-from option

* doc/coreutils.texi: Describe the most common
usage of --files0-from=- to read names from stdin.
* src/du.c: Likewise.
* src/sort.c: Likewise.
* src/wc.c: Likewise.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/wc.c b/src/wc.c
index 280d7ac88..8cfd974ca 100644
--- a/src/wc.c
+++ b/src/wc.c
@@ -121,7 +121,8 @@ read standard input.\n\
 "), stdout);
       fputs (_("\
       --files0-from=F    read input from the files specified by\n\
-                           NUL-terminated names in file F\n\
+                           NUL-terminated names in file F;\n\
+                           If F is - then read names from standard input\n\
   -L, --max-line-length  print the length of the longest line\n\
   -w, --words            print the word counts\n\
 "), stdout);