Fix codespell issues.

See,
$ codespell -S ./vendor*,./.git*

Author: mjtrangoni

README.md

@@ -49,7 +49,7 @@ elasticsearch_exporter --help
 | es.shards             | If true, query stats for all indices in the cluster, including shard-level stats (implies `es.indices=true`). | false |
 | es.snapshots          | If true, query stats for the cluster snapshots. | false |
 | es.timeout            | Timeout for trying to get stats from Elasticsearch. (ex: 20s) | 5s |
-| es.ca                 | Path to PEM file that contains trusted CAs for the Elasticsearch connection. | |
+| es.ca                 | Path to PEM file that contains trusted Certificate Authorities for the Elasticsearch connection. | |
 | es.client-private-key | Path to PEM file that contains the private key for client auth when connecting to Elasticsearch. | |
 | es.client-cert        | Path to PEM file that contains the corresponding cert for the private key to connect to Elasticsearch. | |
 | es.ssl-skip-verify    | Skip SSL verification when connecting to Elasticsearch. | false |
@@ -156,7 +156,7 @@ elasticsearch_exporter --help
 | elasticsearch_snapshot_stats_oldest_snapshot_timestamp     | gauge     | 1            | Oldest snapshot timestamp
 | elasticsearch_snapshot_stats_snapshot_start_time_timestamp | gauge     | 1            | Last snapshot start timestamp
 | elasticsearch_snapshot_stats_snapshot_end_time_timestamp   | gauge     | 1            | Last snapshot end timestamp
-| elasticsearch_snapshot_stats_snapshot_number_of_failures   | gauge     | 1            | Last spnapshot number of failures
+| elasticsearch_snapshot_stats_snapshot_number_of_failures   | gauge     | 1            | Last snapshot number of failures
 | elasticsearch_snapshot_stats_snapshot_number_of_indices    | gauge     | 1            | Last snapshot number of indices
 | elasticsearch_snapshot_stats_snapshot_failed_shards        | gauge     | 1            | Last snapshot failed shards
 | elasticsearch_snapshot_stats_snapshot_successful_shards    | gauge     | 1            | Last snapshot successful shards

collector/cluster_health.go

@@ -74,7 +74,7 @@ func NewClusterHealth(logger log.Logger, client *http.Client, url *url.URL) *Clu
 				Type: prometheus.GaugeValue,
 				Desc: prometheus.NewDesc(
 					prometheus.BuildFQName(namespace, subsystem, "active_primary_shards"),
-					"Tthe number of primary shards in your cluster. This is an aggregate total across all indices.",
+					"The number of primary shards in your cluster. This is an aggregate total across all indices.",
 					defaultClusterHealthLabels, nil,
 				),
 				Value: func(clusterHealth clusterHealthResponse) float64 {

main.go

@@ -26,7 +26,7 @@ func main() {
 		esExportIndices      = flag.Bool("es.indices", false, "Export stats for indices in the cluster.")
 		esExportShards       = flag.Bool("es.shards", false, "Export stats for shards in the cluster (implies es.indices=true).")
 		esExportSnapshots    = flag.Bool("es.snapshots", false, "Export stats for the cluster snapshots.")
-		esCA                 = flag.String("es.ca", "", "Path to PEM file that contains trusted CAs for the Elasticsearch connection.")
+		esCA                 = flag.String("es.ca", "", "Path to PEM file that contains trusted Certificate Authorities for the Elasticsearch connection.")
 		esClientPrivateKey   = flag.String("es.client-private-key", "", "Path to PEM file that contains the private key for client auth when connecting to Elasticsearch.")
 		esClientCert         = flag.String("es.client-cert", "", "Path to PEM file that contains the corresponding cert for the private key to connect to Elasticsearch.")
 		esInsecureSkipVerify = flag.Bool("es.ssl-skip-verify", false, "Skip SSL verification when connecting to Elasticsearch.")