Minor style and typo corrections
diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index f906545..3bd2c35 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -114,7 +114,7 @@
all_final += server1.v1.crt server1.v1.der
# OpenSSL-generated certificates for comparison
-# Also provide certificates to DER format to allow
+# Also provide certificates in DER format to allow
# direct binary comparison using e.g. dumpasn1
server1.crt.openssl server1.key_usage.crt.openssl server1.cert_type.crt.openssl: server1.key server1.csr $(test_ca_crt) $(test_ca_key_file_rsa) $(test_ca_server1_config_file)
echo "01" > $(test_ca_server1_serial)