Fixed duplicate windows typo, cleaned up missing param pieces, clarified allowed chmod settings language for newbies.

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@30176 c90b9560-bf6c-de11-be94-00142212c4b1

functions/filesystem.xml

@@ -57,10 +57,10 @@ $file = basename($path); // $file is set to "index.php3"
      </funcprototype>
     </funcsynopsis>
     <para>
-     Attempts to change the group of the file filename to group. Only
-     the superuser may change the group of a file arbitrarily; other
-     users may change the group of a file to any group of which that
-     user is a member.
+     Attempts to change the group of the file
+     <parameter>filename</parameter> to <parameter>group</parameter>. Only the
+     superuser may change the group of a file arbitrarily; other users may change
+     the group of a file to any group of which that user is a member.
     </para>
     <para>
      Returns true on success; otherwise returns false.
@@ -98,7 +98,8 @@ $file = basename($path); // $file is set to "index.php3"
     </para>
     <para>
      Note that <parameter>mode</parameter> is not automatically
-     assumed to be an octal value. To ensure the expected operation,
+     assumed to be an octal value, so strings (such as "g+w") will
+     not work properly. To ensure the expected operation,
      you need to prefix <parameter>mode</parameter> with a zero (0):
      <informalexample>
       <programlisting role="php">
@@ -142,10 +143,6 @@ chmod( "/somedir/somefile", 0755 );  // octal; correct value of mode
     </para>
     <para>
      Returns true on success; otherwise returns false.
-     <note>
-      <simpara>On Windows, does nothing and returns true.
-      </simpara>
-     </note>
     </para>
     <para>
      See also <function>chown</function> and