remote-mediawiki tests: replace deprecated Perl construct

The use of the encoding pragma has been a hard error since Perl
5.18 (released in 2013).

What this script really wanted to do was to decode @ARGV and write out
some files with the UTF-8 PerlIO layer. Let's just do that explicitly
instead.

This explicitly does not retain the previous UTF-8 semantics of the
script. The "encoding" pragma had all sorts of global effects (program
text being UTF-8, stdin/stdout etc.). But the only thing that was
required was decoding @ARGV and writing out UTF-8 data, which is
currently facilitated with the "open" pragma.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

contrib/mw-to-git/t/test-gitmw.pl

@@ -24,7 +24,6 @@
 
 use MediaWiki::API;
 use Getopt::Long;
-use encoding 'utf8';
 use DateTime::Format::ISO8601;
 use open ':encoding(utf8)';
 use constant SLASH_REPLACEMENT => "%2F";
@@ -222,4 +221,4 @@ sub wiki_upload_file {
 	getallpagename => \&wiki_getallpagename,
 );
 die "$0 ERROR: wrong argument" unless exists $functions_to_call{$fct_to_call};
-$functions_to_call{$fct_to_call}->(@ARGV);
+$functions_to_call{$fct_to_call}->(map { utf8::decode($_); $_ } @ARGV);