docs: fix examples (#1608)

* chore: fix a compile error
* style: apply gofmt to sample code

Author: orisano

docs/howto/insert.md

@@ -154,11 +154,11 @@ INSERT INTO authors (name, bio) VALUES ($1, $2);
 
 ```go
 type CreateAuthorsParams struct {
-  Name string
-  Bio  string
+	Name string
+	Bio  string
 }
 
 func (q *Queries) CreateAuthors(ctx context.Context, arg []CreateAuthorsParams) (int64, error) {
-  return q.db.CopyFrom(ctx, []string{"authors"}, []string{"name", "bio"}, &iteratorForCreateAuthors{rows: arg})
+	return q.db.CopyFrom(ctx, []string{"authors"}, []string{"name", "bio"}, &iteratorForCreateAuthors{rows: arg})
 }
 ```

docs/howto/transactions.md

@@ -58,7 +58,7 @@ func (q *Queries) GetRecord(ctx context.Context, id int) (Record, error) {
 With pgx you'd use it like this for example:
 
 ```go
-function bumpCounter(ctx context.Context, p *pgx.Conn, id int) error {
+func bumpCounter(ctx context.Context, p *pgx.Conn, id int) error {
 	tx, err := db.Begin(ctx)
 	if err != nil {
 		return err
@@ -71,7 +71,7 @@ function bumpCounter(ctx context.Context, p *pgx.Conn, id int) error {
 	}
 	if err := q.UpdateRecord(ctx, db.UpdateRecordParams{
 		ID:      r.ID,
-		Counter: r.Counter+1,
+		Counter: r.Counter + 1,
 	}); err != nil {
 		return err
 	}

docs/reference/query-annotations.md

@@ -130,9 +130,10 @@ WHERE book_id = $1;
 
 ```go
 type DeleteBookBatchResults struct {
-	br pgx.BatchResults
+	br  pgx.BatchResults
 	ind int
 }
+
 func (q *Queries) DeleteBook(ctx context.Context, bookID []int32) *DeleteBookBatchResults {
 	//...
 }
@@ -161,13 +162,14 @@ WHERE title = $1 AND year = $2;
 
 ```go
 type BooksByTitleYearBatchResults struct {
-	br pgx.BatchResults
+	br  pgx.BatchResults
 	ind int
 }
 type BooksByTitleYearParams struct {
 	Title string `json:"title"`
 	Year  int32  `json:"year"`
 }
+
 func (q *Queries) BooksByTitleYear(ctx context.Context, arg []BooksByTitleYearParams) *BooksByTitleYearBatchResults {
 	//...
 }
@@ -202,13 +204,14 @@ RETURNING book_id, author_id, isbn
 
 ```go
 type CreateBookBatchResults struct {
-	br pgx.BatchResults
+	br  pgx.BatchResults
 	ind int
 }
 type CreateBookParams struct {
-	AuthorID  int32     `json:"author_id"`
-	Isbn      string    `json:"isbn"`
+	AuthorID int32  `json:"author_id"`
+	Isbn     string `json:"isbn"`
 }
+
 func (q *Queries) CreateBook(ctx context.Context, arg []CreateBookParams) *CreateBookBatchResults {
 	//...
 }