Describes new options of encode, refs #1233

doc/Type/Encoding/Registry.pod6

@@ -11,7 +11,7 @@ available for any Perl 6 application, namely:
 
 =item C<utf8>
 =item C<utf8-c8>
-=item Cutf16>
+=item C<utf16>
 =item C<utf32>, C<utf-32>
 =item C<ascii>
 =item C<iso-8859-1>, C<iso_8859-1:1987>, C<iso_8859-1>, C<iso-ir-100>, C<latin1>, C<latin-1>, C<csisolatin1>, C<l1>, C<ibm819>, C<cp819>

doc/Type/Str.pod6

@@ -123,12 +123,17 @@ currently erroneously returns the number of codepoints instead.
 
 =head2 method encode
 
-    multi method encode(Str:D: $encoding, $nf --> Blob)
-
-Returns a L<Blob> which represents the original string in the given encoding
-and normal form. The actual return type is as specific as possible, so
-C<$str.encode('UTF-8')> returns a C<utf8> object,
-C<$str.encode('ISO-8859-1')> a C<buf8>.
+    multi method encode(Str:D $encoding = 'utf8', :$replacement,
+                        Bool() :$translate-nl = False, :$strict)
+
+Returns a L<Blob> which represents the original string in the given encoding and
+normal form. The actual return type is as specific as possible, so
+C<$str.encode('UTF-8')> returns a C<utf8> object, C<$str.encode('ISO-8859-1')> a
+C<buf8>. If C<:translate-nl> is set to C<True>, it will translate newlines from
+C<\n> to C<\n\r>, but only in Windows. C<$replacement> indicates how characters
+are going to be replaced in the case they are not available in the current
+encoding, while C<$strict> indicates whether unmapped codepoints will still
+decode; for instance, codepoint 129 which does not exist in C<windows-1252>.
 
 =head2 routine index