fix completion tests

tests/misc/projects/Issue3288/with-empty-type.hxml

@@ -1 +1,2 @@
 --display MainWithEmptyType.hx@64
+-D display-details

tests/misc/projects/Issue3288/with-type.hxml

@@ -1 +1,2 @@
 --display MainWithType.hx@59
+-D display-details

tests/misc/projects/Issue3288/without-type.hxml

@@ -1 +1,2 @@
 --display MainWithoutType.hx@62
+-D display-details