typos fixed per review

Signed-off-by: Shlomi Noach <[email protected]>

go/test/endtoend/onlineddl_revert/onlineddl_revert_test.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 The Vitess Authors.
+Copyright 2021 The Vitess Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -275,7 +275,7 @@ func TestSchemaChange(t *testing.T) {
 		testSelectTableMetrics(t)
 	})
 	t.Run("fail revert older change", func(t *testing.T) {
-		// We shouldn't be able to revert one-before-last succcessfulk migration.
+		// We shouldn't be able to revert one-before-last succcessful migration.
 		uuid := testRevertMigration(t, uuids[len(uuids)-2])
 		uuids = append(uuids, uuid)
 		checkRecentMigrations(t, uuid, schema.OnlineDDLStatusFailed)
@@ -544,7 +544,7 @@ func checkRecentMigrations(t *testing.T, uuid string, expectStatus schema.Online
 	fmt.Println("# 'vtctlclient OnlineDDL show recent' output (for debug purposes):")
 	fmt.Println(result)
 	assert.Equal(t, len(clusterInstance.Keyspaces[0].Shards), strings.Count(result, uuid))
-	// We ensure "full word" regexp becuase some column names may conflict
+	// We ensure "full word" regexp because some column names may conflict
 	expectStatusRegexp := fullWordUUIDRegexp(uuid, string(expectStatus))
 	m := expectStatusRegexp.FindAllString(result, -1)
 	assert.Equal(t, len(clusterInstance.Keyspaces[0].Shards), len(m))

go/vt/schema/online_ddl.go

@@ -239,7 +239,7 @@ func (onlineDDL *OnlineDDL) GetActionStr() (action sqlparser.DDLAction, actionSt
 
 // GetRevertUUID works when this migration is a revert for another migration. It returns the UUID
 // fo the reverted migration.
-// The functio nreturns error when this is not a revert migration.
+// The function returns error when this is not a revert migration.
 func (onlineDDL *OnlineDDL) GetRevertUUID() (uuid string, err error) {
 	if submatch := revertStatementRegexp.FindStringSubmatch(onlineDDL.SQL); len(submatch) > 0 {
 		return submatch[1], nil