Fix spelling mistakes (#4888)

plugins/outputs/cratedb/cratedb.go

@@ -183,7 +183,7 @@ func escapeObject(m map[string]interface{}) (string, error) {
 	return `{` + strings.Join(pairs, ", ") + `}`, nil
 }
 
-// escapeString wraps s in the given quote string and replaces all occurences
+// escapeString wraps s in the given quote string and replaces all occurrences
 // of it inside of s with a double quote.
 func escapeString(s string, quote string) string {
 	return quote + strings.Replace(s, quote, quote+quote, -1) + quote
@@ -191,7 +191,7 @@ func escapeString(s string, quote string) string {
 
 // hashID returns a cryptographic hash int64 hash that includes the metric name
 // and tags. It's used instead of m.HashID() because it's not considered stable
-// and because a cryptogtaphic hash makes more sense for the use case of
+// and because a cryptographic hash makes more sense for the use case of
 // deduplication.
 // [1] https://github.com/influxdata/telegraf/pull/3210#discussion_r148411201
 func hashID(m telegraf.Metric) int64 {

plugins/outputs/graphite/graphite.go

@@ -173,7 +173,7 @@ func (g *Graphite) send(batch []byte) error {
 		if _, e := g.conns[n].Write(batch); e != nil {
 			// Error
 			log.Println("E! Graphite Error: " + e.Error())
-			// Close explicitely
+			// Close explicitly
 			g.conns[n].Close()
 			// Let's try the next one
 		} else {

plugins/outputs/influxdb/http.go

@@ -220,7 +220,7 @@ func (c *httpClient) Database() string {
 	return c.database
 }
 
-// CreateDatabase attemps to create a new database in the InfluxDB server.
+// CreateDatabase attempts to create a new database in the InfluxDB server.
 // Note that some names are not allowed by the server, notably those with
 // non-printable characters or slashes.
 func (c *httpClient) CreateDatabase(ctx context.Context) error {