Reformat some Go files

When working on #994 I noticed that some Go files are not formatted with
`gofmt`.

This PR fixes this.

storage/feed.go

@@ -125,7 +125,7 @@ func (s *Storage) FeedsWithCounters(userID int64) (model.Feeds, error) {
 	builder.WithCounters()
 	builder.WithOrder(model.DefaultFeedSorting)
 	builder.WithDirection(model.DefaultFeedSortingDirection)
-	return  builder.GetFeeds()
+	return builder.GetFeeds()
 }
 
 // FeedsByCategoryWithCounters returns all feeds of the given user/category with counters of read and unread entries.
@@ -176,7 +176,7 @@ func (s *Storage) FeedByID(userID, feedID int64) (*model.Feed, error) {
 	case err != nil:
 		return nil, fmt.Errorf(`store: unable to fetch feed #%d: %v`, feedID, err)
 	}
-	
+
 	return feed, nil
 }
 

storage/feed_query_builder.go

@@ -15,17 +15,17 @@ import (
 
 // FeedQueryBuilder builds a SQL query to fetch feeds.
 type FeedQueryBuilder struct {
-	store              *Storage
-	args               []interface{}
-	conditions         []string
-	order              string
-	direction          string
-	limit              int
-	offset             int
-	withCounters       bool
-	counterJoinFeeds    bool
-	counterArgs        []interface{}
-	counterConditions  []string
+	store             *Storage
+	args              []interface{}
+	conditions        []string
+	order             string
+	direction         string
+	limit             int
+	offset            int
+	withCounters      bool
+	counterJoinFeeds  bool
+	counterArgs       []interface{}
+	counterConditions []string
 }
 
 // NewFeedQueryBuilder returns a new FeedQueryBuilder.
@@ -304,4 +304,4 @@ func (f *FeedQueryBuilder) fetchFeedCounter() (unreadCounters map[int64]int, rea
 	}
 
 	return readCounters, unreadCounters, nil
-}
+}