Update the comment

gitlab.go

@@ -526,8 +526,9 @@ func rateLimitBackoff(min, max time.Duration, attemptNum int, resp *http.Respons
 				}
 			}
 		} else {
-			// For each attempt without the header, back off an additiona 100% exponentially. With the default milliseconds
-			// being set to 100 for `min`, this makes the 5th retry wait 3.2 seconds (3,200 ms) by default
+			// In case the RateLimit-Reset header is not set, back off an additional
+			// 100% exponentially. With the default milliseconds being set to 100 for
+			// `min`, this makes the 5th retry wait 3.2 seconds (3,200 ms) by default.
 			min = time.Duration(float64(min) * math.Pow(2, float64(attemptNum)))
 		}
 	}