added comment to top of diff.awk

1 files changed, 2 insertions, 0 deletions

diff --git a/diff.awk b/diff.awk
index 41859db..1032659 100644
--- a/diff.awk
+++ b/diff.awk
@@ -1,3 +1,5 @@
+### diff.awk
+# numerical diff along columns
 
 BEGIN {
     sign = "[+-]?"