Fix typos and linter warnings

config.go

@@ -435,17 +435,17 @@ func init() {
 	if conf.DownloadBufferSize < 0 {
 		logFatal("Download buffer size should be greater than or equal to 0")
 	} else if conf.DownloadBufferSize > int(^uint32(0)) {
-		logFatal("Download buffer size can't be creater than %d", ^uint32(0))
+		logFatal("Download buffer size can't be greater than %d", ^uint32(0))
 	}
 
 	if conf.GZipBufferSize < 0 {
 		logFatal("GZip buffer size should be greater than or equal to 0")
 	} else if conf.GZipBufferSize > int(^uint32(0)) {
-		logFatal("GZip buffer size can't be creater than %d", ^uint32(0))
+		logFatal("GZip buffer size can't be greater than %d", ^uint32(0))
 	}
 
 	if conf.BufferPoolCalibrationThreshold < 64 {
-		logFatal("Buffer pool calibration threshhold should be greater than or equal to 64")
+		logFatal("Buffer pool calibration threshold should be greater than or equal to 64")
 	}
 
 	initNewrelic()

process.go

@@ -426,11 +426,7 @@ func transformImage(ctx context.Context, img **C.struct__VipsImage, data []byte,
 		}
 	}
 
-	if err = vipsFixColourspace(img); err != nil {
-		return err
-	}
-
-	return nil
+	return vipsFixColourspace(img)
 }
 
 func transformGif(ctx context.Context, img **C.struct__VipsImage, po *processingOptions) error {

prometheus.go

@@ -33,7 +33,7 @@ func initPrometheus() {
 
 	prometheusErrorsTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
 		Name: "errors_total",
-		Help: "A counter of the occured errors separated by type.",
+		Help: "A counter of the occurred errors separated by type.",
 	}, []string{"type"})
 
 	prometheusRequestDuration = prometheus.NewHistogram(prometheus.HistogramOpts{