Fix spelling errors reported by misspell (#750)

* fix formatting + require Go 1.15

* fix spelling errors

Author: Achille

Makefile

@@ -1,7 +1,7 @@
-test: 
+test:
 	KAFKA_SKIP_NETTEST=1 \
 	KAFKA_VERSION=2.3.1 \
 	go test -race -cover ./...
 
-docker: 
-	docker-compose up -d
+docker:
+	docker-compose up -d

addoffsetstotxn.go

@@ -33,7 +33,7 @@ type AddOffsetsToTxnResponse struct {
 	// The amount of time that the broker throttled the request.
 	Throttle time.Duration
 
-	// An error that may have occured when attempting to add the offsets
+	// An error that may have occurred when attempting to add the offsets
 	// to a transaction.
 	//
 	// The errors contain the kafka error code. Programs may use the standard

addpartitionstotxn.go

@@ -50,7 +50,7 @@ type AddPartitionToTxnPartition struct {
 	// The ID of the partition.
 	Partition int
 
-	// An error that may have occured when attempting to add the partition
+	// An error that may have occurred when attempting to add the partition
 	// to a transaction.
 	//
 	// The errors contain the kafka error code. Programs may use the standard

compress/zstd/zstd.go

@@ -144,7 +144,7 @@ func (w *writer) Close() error {
 		if err != nil {
 			w.err = err
 		}
-		w.enc.Reset(devNull{}) // don't retain the underyling writer
+		w.enc.Reset(devNull{}) // don't retain the underlying writer
 		w.c.encoderPool.Put(w.enc)
 		w.enc = nil
 		return err

endtxn.go

@@ -23,7 +23,7 @@ type EndTxnRequest struct {
 	// The epoch associated with the current producer session for the given PID
 	ProducerEpoch int
 
-	// Committed should be set to true if the transaction was commited, false otherwise.
+	// Committed should be set to true if the transaction was committed, false otherwise.
 	Committed bool
 }
 

heartbeat.go

@@ -30,7 +30,7 @@ type HeartbeatRequest struct {
 
 // HeartbeatResponse represents a response from a heartbeat request.
 type HeartbeatResponse struct {
-	// Error is set to non-nil if an error occured.
+	// Error is set to non-nil if an error occurred.
 	Error error
 
 	// The amount of time that the broker throttled the request.