Typo ‘filesa’ (#2265)

Author: jnm2

xml/System.IO/DirectoryInfo.xml

@@ -2756,7 +2756,7 @@
         <Parameter Name="searchOption" Type="System.IO.SearchOption" Index="1" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netstandard-1.3;netstandard-1.4;netstandard-1.6;netstandard-2.0;netstandard-2.1;xamarinandroid-7.1;xamarinios-10.8;xamarinmac-3.0" />
       </Parameters>
       <Docs>
-        <param name="searchPattern">The search string to match against the names of directories and filesa.  This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions.</param>
+        <param name="searchPattern">The search string to match against the names of directories and files.  This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions.</param>
         <param name="searchOption">One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. The default value is <see cref="F:System.IO.SearchOption.TopDirectoryOnly" />.</param>
         <summary>Retrieves an array of <see cref="T:System.IO.FileSystemInfo" /> objects that represent the files and subdirectories matching the specified search criteria.</summary>
         <returns>An array of file system entries that match the search criteria.</returns>