Fix phpdocs AND docs (#732)

docs/en/command/ddl.md

@@ -58,7 +58,7 @@ CREATE TABLE `customer` (
 
 ### Drop a table
 
-To drop a table with schema declaration and and all its data, you can use the 
+To drop a table with schema declaration and all its data, you can use the 
 `Yiisoft\Db\Command\CommandInterface::dropTable()` method:
 
 ```php

src/QueryBuilder/DDLQueryBuilderInterface.php

@@ -281,23 +281,23 @@ public function dropCheck(string $table, string $name): string;
  public function dropColumn(string $table, string $column): string;
 
  /**
- * Builds an SQL command for adding comment to column.
+ * Builds an SQL command for dropping comment to column.
  *
  * @param string $table The table whose column is to comment.
  * @param string $column The name of the column to comment.
  *
- * @return string The SQL statement for adding comment on column.
+ * @return string The SQL statement for dropping comment on column.
  *
  * Note: The method will quote the `table` and `column` parameters before using them in the generated SQL.
  */
  public function dropCommentFromColumn(string $table, string $column): string;
 
  /**
- * Builds an SQL command for adding comment to the table.
+ * Builds an SQL command for dropping comment to the table.
  *
  * @param string $table The table whose column is to comment.
  *
- * @return string The SQL statement for adding comment on column.
+ * @return string The SQL statement for dropping comment on column.
  *
  * Note: The method will quote the `table` parameter before using it in the generated SQL.
  */