Fixed formatting

Signed-off-by: cezmunsta <github@incoming-email.co.uk>

Author: cezmunsta

cmd/postgres_exporter/postgres_exporter.go

@@ -282,12 +282,12 @@ var builtinMetricMaps = map[string]intermediateMetricMap{
 },
 "pg_stat_activity": {
 map[string]ColumnMapping{
-"datname": {LABEL, "Name of this database", nil, nil},
-"state": {LABEL, "connection state", nil, semver.MustParseRange(">=9.2.0")},
+"datname":  {LABEL, "Name of this database", nil, nil},
+"state":  {LABEL, "connection state", nil, semver.MustParseRange(">=9.2.0")},
 "usename": {LABEL, "connection usename", nil, nil},
 "application_name": {LABEL, "connection application_name", nil, nil},
-"count": {GAUGE, "number of connections in this state", nil, nil},
-"max_tx_duration": {GAUGE, "max duration in seconds any active transaction has been running", nil, nil},
+"count":  {GAUGE, "number of connections in this state", nil, nil},
+"max_tx_duration":  {GAUGE, "max duration in seconds any active transaction has been running", nil, nil},
 },
 true,
 0,