Fix typos

CHANGELOG.md

@@ -15,7 +15,7 @@
 * Encode and decode between all Go and PostgreSQL integer types with bounds checking
 * Decode inet/cidr to net.IP
 * Encode/decode [][]byte to/from bytea[]
-* Encode/decode named types whoses underlying types are string, int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64
+* Encode/decode named types whose underlying types are string, int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64
 
 ## Performance
 

doc.go

@@ -50,7 +50,7 @@ pgx also implements QueryRow in the same style as database/sql.
         return err
     }
 
-Use exec to execute a query that does not return a result set.
+Use Exec to execute a query that does not return a result set.
 
     commandTag, err := conn.Exec("delete from widgets where id=$1", 42)
     if err != nil {