Fix Typo. (#1508)

Author: dogac00

Dapper/SqlMapper.cs

@@ -712,7 +712,7 @@ public static dynamic QuerySingleOrDefault(this IDbConnection cnn, string sql, o
         /// <param name="commandTimeout">The command timeout (in seconds).</param>
         /// <param name="commandType">The type of command to execute.</param>
         /// <returns>
-        /// A sequence of data of the supplied type; if a basic type (int, string, etc) is queried then the data from the first column in assumed, otherwise an instance is
+        /// A sequence of data of the supplied type; if a basic type (int, string, etc) is queried then the data from the first column is assumed, otherwise an instance is
         /// created per row, and a direct column-name===member-name mapping is assumed (case insensitive).
         /// </returns>
         public static IEnumerable<T> Query<T>(this IDbConnection cnn, string sql, object param = null, IDbTransaction transaction = null, bool buffered = true, int? commandTimeout = null, CommandType? commandType = null)