Fix postgres plugin with testing ok with fmt

plugins/inputs/postgresql/postgresql.go

@@ -4,8 +4,8 @@ import (
 	"bytes"
 	"database/sql"
 	"fmt"
-	"strings"
 	"sort"
+	"strings"
 
 	"github.com/influxdata/telegraf"
 	"github.com/influxdata/telegraf/plugins/inputs"
@@ -17,7 +17,7 @@ type Postgresql struct {
 	Address        string
 	Databases      []string
 	OrderedColumns []string
-	AllColumns	[]string
+	AllColumns     []string
 }
 
 var ignoredColumns = map[string]bool{"datid": true, "datname": true, "stats_reset": true}

plugins/inputs/postgresql/postgresql_test.go

@@ -43,15 +43,15 @@ func TestPostgresqlGeneratesMetrics(t *testing.T) {
 		"temp_bytes",
 		"deadlocks",
 		"numbackends",
-                "buffers_alloc",
-                "buffers_backend",
-                "buffers_backend_fsync",
-                "buffers_checkpoint",
-                "buffers_clean",
-                "checkpoints_req",
-                "checkpoints_timed",
-                "maxwritten_clean",
-        }
+		"buffers_alloc",
+		"buffers_backend",
+		"buffers_backend_fsync",
+		"buffers_checkpoint",
+		"buffers_clean",
+		"checkpoints_req",
+		"checkpoints_timed",
+		"maxwritten_clean",
+	}
 
 	floatMetrics := []string{
 		"blk_read_time",