Test a weight of 0 drawn against nothing naming the drop, and null alone on stdin naming jq

cmd/fejkdata/main_test.go

@@ -495,8 +495,8 @@ func TestRunTemplateMisuse(t *testing.T) {
 		"42":                    "number",
 		"42\n":                  "number",
 		"true\n":                "boolean",
-		"null\n":                `write ""`,
-		" null ":                `write ""`,
+		"null\n":                "jq",
+		" null ":                "jq",
 		"{//sv_SE.person}":      "write {/sv_SE.person}",
 	} {
 		code, out, errb := runOut(stdin, "--seed", "1")

spellings_test.go

@@ -36,6 +36,7 @@ func TestAWeightWithNothingToDrawAgainstIsRejected(t *testing.T) {
 		`{"format":"a","weight":2}`,
 		`{"format":"{x}","x":{"format":"a","weight":2}}`,
 		`[{"format":"a","weight":2}]`,
+		`{"format":"a","weight":0}`,
 	} {
 		_, err := resolved(t, src)
 		if err == nil || !strings.Contains(err.Error(), `drop "weight"`) || strings.Contains(err.Error(), "can never be a field") || strings.Contains(err.Error(), "only skews a choice's items") {