Fixed bug in open-coverage Make target.

ezzatron · ezzatron · commit c2f201e809ac · 2017-04-24T13:59:12.000+10:00
diff --git a/Makefile b/Makefile
@@ -7,7 +7,7 @@ coverage: install
 	phpdbg -qrr vendor/bin/phpunit
 
 open-coverage:
-	open coverage/index.
+	open coverage/index.html
 
 integration: install
 	test/integration/run
