kill: improve comment
diff --git a/procps/kill.c b/procps/kill.c
index 3ccbd30..3e0e121 100644
--- a/procps/kill.c
+++ b/procps/kill.c
@@ -36,7 +36,8 @@
#else
/* How to determine who we are? find 3rd char from the end:
* kill, killall, killall5
- * ^i ^a ^l */
+ * ^i ^a ^l - it's unique
+ * (checking from the start is complicated by /bin/kill... case) */
const char char3 = argv[0][strlen(argv[0]) - 3];
#define killall (ENABLE_KILLALL && char3 == 'a')
#define killall5 (ENABLE_KILLALL5 && char3 == 'l')