diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..cba7efc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+a.out
diff --git a/pike.c b/pike.c
index 6900e9d..7eba58f 100644
--- a/pike.c
+++ b/pike.c
@@ -1,6 +1,5 @@
 // Copyright 2007-2009 Russ Cox.  All Rights Reserved.
 // Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -201,7 +200,7 @@ void re_dumpcode(rcode *prog)
 			printf("any\n");
 			break;
 		case CLASS:
-		case CLASSNOT: {
+		case CLASSNOT:;
 			int num = code[pc];
 			printf("class%s %d", (code[pc - 1] == CLASSNOT ? "not" : ""), num);
 			pc++;
@@ -211,7 +210,6 @@ void re_dumpcode(rcode *prog)
 			}
 			printf("\n");
 			break;
-		}
 		case NAMEDCLASS:
 			printf("namedclass %c\n", code[pc++]);
 			break;
@@ -632,6 +630,10 @@ int re_pikevm(rcode *prog, const char *s, const char **subp, int nsubp)
 
 int main(int argc, char *argv[])
 {
+	if (argc < 2) {
+		printf("usage: <regex> <str...> <str...> ...\n");
+		return 0;
+	}
 	int sz = re_sizecode(argv[1]) * sizeof(int);
 	printf("Precalculated size: %d\n", sz);
 	char code[sizeof(rcode)+sz];
diff --git a/test.sh b/test.sh
index 9954700..161b860 100755
--- a/test.sh
+++ b/test.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 
 regex="\
 abc
@@ -38,7 +39,6 @@ a{5}
 (abc+){5}|[0-9]{1,}
 b[^c]*
 "
-
 input="\
 abcdef
 abcdef
@@ -78,7 +78,6 @@ abcabcabcabcabcabchsdfhsdh
 62374623
 djfjgjsdfjbshdhfhshd
 "
-
 expect="\
 (0,3)
 (2,5)
@@ -119,7 +118,6 @@ expect="\
 (10,20)
 (0,0)
 "
-
 c=1
 echo "$regex" | tr '\n' | while read re; do
 	inp=$(echo "$input" | awk -v c=$c 'BEGIN{ RS = "" ; FS = "\n" }{print $c}')