Use const slashSeparator instead of "/" everywhere (#8028)

cmd/signature-v4-parser_test.go

@@ -36,7 +36,7 @@ func joinWithSlash(accessKey, date, region, service, requestVersion string) stri
 		date,
 		region,
 		service,
-		requestVersion}, "/")
+		requestVersion}, SlashSeparator)
 }
 
 // generate CredentialHeader from its fields.
@@ -79,12 +79,12 @@ func validateCredentialfields(t *testing.T, testNum int, expectedCredentials cre
 
 // TestParseCredentialHeader - validates the format validator and extractor for the Credential header in an aws v4 request.
 // A valid format of creadential should be of the following format.
-// Credential = accessKey + "/"+ scope
+// Credential = accessKey + SlashSeparator+ scope
 // where scope = string.Join([]string{  currTime.Format(yyyymmdd),
 // 			globalMinioDefaultRegion,
 //               	"s3",
 //		        "aws4_request",
-//                       },"/")
+//                       },SlashSeparator)
 func TestParseCredentialHeader(t *testing.T) {
 
 	sampleTimeStr := UTCNow().Format(yyyymmdd)