doc: indicate the default algorithm in the sum(1) man page

* src/sum.c (usage): Indicate that -r (BSD algorithm) is the default.

diff --git a/src/sum.c b/src/sum.c
index 018623d4783e29138b97f292e75e41d3fd08afbe..c66147edc3138362fab63626a26898e5d1fa74b0 100644 (file)
--- a/src/sum.c
+++ b/src/sum.c
@@ -68,7 +68,7 @@ Print checksum and block counts for each FILE.\n\
 
       fputs (_("\
 \n\
-  -r              use BSD sum algorithm, use 1K blocks\n\
+  -r              use BSD sum algorithm (the default), use 1K blocks\n\
   -s, --sysv      use System V sum algorithm, use 512 bytes blocks\n\
 "), stdout);
       fputs (HELP_OPTION_DESCRIPTION, stdout);