Avoid '\n' from constant strings (#9737)

Fixes #9736

cmd/dummy-handlers.go

@@ -89,7 +89,7 @@ func (api objectAPIHandlers) GetBucketAccelerateHandler(w http.ResponseWriter, r
 		return
 	}
 
-	const accelerateDefaultConfig = `<?xml version="1.0" encoding="UTF-8"?>\n<AccelerateConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"/>`
+	const accelerateDefaultConfig = `<?xml version="1.0" encoding="UTF-8"?><AccelerateConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"/>`
 	writeSuccessResponseXML(w, []byte(accelerateDefaultConfig))
 }
 
@@ -122,7 +122,7 @@ func (api objectAPIHandlers) GetBucketRequestPaymentHandler(w http.ResponseWrite
 		return
 	}
 
-	const requestPaymentDefaultConfig = `<?xml version="1.0" encoding="UTF-8"?>\n<RequestPaymentConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Payer>BucketOwner</Payer></RequestPaymentConfiguration>`
+	const requestPaymentDefaultConfig = `<?xml version="1.0" encoding="UTF-8"?><RequestPaymentConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Payer>BucketOwner</Payer></RequestPaymentConfiguration>`
 
 	writeSuccessResponseXML(w, []byte(requestPaymentDefaultConfig))
 }
@@ -156,7 +156,7 @@ func (api objectAPIHandlers) GetBucketLoggingHandler(w http.ResponseWriter, r *h
 		return
 	}
 
-	const loggingDefaultConfig = `<?xml version="1.0" encoding="UTF-8"?>\n\n<BucketLoggingStatus xmlns="http://s3.amazonaws.com/doc/2006-03-01/">\n  <!--<LoggingEnabled><TargetBucket>myLogsBucket</TargetBucket><TargetPrefix>add/this/prefix/to/my/log/files/access_log-</TargetPrefix></LoggingEnabled>-->\n</BucketLoggingStatus>\n`
+	const loggingDefaultConfig = `<?xml version="1.0" encoding="UTF-8"?><BucketLoggingStatus xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><!--<LoggingEnabled><TargetBucket>myLogsBucket</TargetBucket><TargetPrefix>add/this/prefix/to/my/log/files/access_log-</TargetPrefix></LoggingEnabled>--></BucketLoggingStatus>`
 	writeSuccessResponseXML(w, []byte(loggingDefaultConfig))
 }