net/http: correct error messages for TestParseSetCookie

This change fixes typos in error messages, while here, also improves
'line' strings to indicate the errEqualNotFoundInCookie error.

Change-Id: I0ce6115c605844d2d86f337f208fd3b2d3774674
Reviewed-on: https://go-review.googlesource.com/c/go/+/579799
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Joedian Reid <joedian@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
diff --git a/src/net/http/cookie_test.go b/src/net/http/cookie_test.go
index de47682..fdbe2723 100644
--- a/src/net/http/cookie_test.go
+++ b/src/net/http/cookie_test.go
@@ -709,7 +709,7 @@
 			err:  errBlankCookie,
 		},
 		{
-			line: "whatever",
+			line: "equal-not-found",
 			err:  errEqualNotFoundInCookie,
 		},
 		{
@@ -867,7 +867,7 @@
 			err:  errBlankCookie,
 		},
 		{
-			line: "whatever",
+			line: "equal-not-found",
 			err:  errEqualNotFoundInCookie,
 		},
 		{
@@ -882,10 +882,10 @@
 	for i, tt := range tests {
 		gotCookie, gotErr := ParseSetCookie(tt.line)
 		if !errors.Is(gotErr, tt.err) {
-			t.Errorf("#%d ParseCookie got error %v, want error %v", i, gotErr, tt.err)
+			t.Errorf("#%d ParseSetCookie got error %v, want error %v", i, gotErr, tt.err)
 		}
 		if !reflect.DeepEqual(gotCookie, tt.cookie) {
-			t.Errorf("#%d ParseCookie:\ngot cookie: %s\nwant cookie: %s\n", i, toJSON(gotCookie), toJSON(tt.cookie))
+			t.Errorf("#%d ParseSetCookie:\ngot cookie: %s\nwant cookie: %s\n", i, toJSON(gotCookie), toJSON(tt.cookie))
 		}
 	}
 }