add missing backslash-before-newline in usage message

diff --git a/src/sort.c b/src/sort.c
index bb7a4491767ffea14a8ddd0c5db10ee9a75e3ac2..04ac265f4d01694a0d354f9860b36f9bf827266e 100644 (file)
--- a/src/sort.c
+++ b/src/sort.c
@@ -291,7 +291,7 @@ Write sorted concatenation of all FILE(s) to standard output.\n\
 \n\
   +POS1 [-POS2]    start a key at POS1, end it *before* POS2 (obsolescent)\n\
                     field numbers and character offsets are numbered\n\
-                     starting with zero (contrast with the -k option)\n
+                     starting with zero (contrast with the -k option)\n\
   -b               ignore leading blanks in sort fields or keys\n\
   -c               check if given files already sorted, do not sort\n\
   -d               consider only [a-zA-Z0-9 ] characters in keys\n\