Update echo_test.go

fix typo

Author: pwli0755

echo_test.go

@@ -99,16 +99,16 @@ func TestEchoStatic(t *testing.T) {
 			givenRoot:            "_fixture",
 			whenURL:              "/folder",
 			expectStatus:         http.StatusMovedPermanently,
-			expectHeaderLocation: "/static/",
+			expectHeaderLocation: "/folder/",
 			expectBodyStartsWith: "",
 		},
     {
 			name:                 "Directory Redirect with non-root path",
 			givenPrefix:          "/static",
 			givenRoot:            "_fixture",
-			whenURL:              "/folder",
+			whenURL:              "/static",
 			expectStatus:         http.StatusMovedPermanently,
-			expectHeaderLocation: "/folder/",
+			expectHeaderLocation: "/static/",
 			expectBodyStartsWith: "",
 		},
 		{