git-remote-mediawiki: rewrite unclear line of instructions

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 3d1a324cf936b0cca4d3c0394a6dcb6840574f42..5e0083304094d7658701910410cf05b55bf06c8f 100755 (executable)
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -1333,7 +1333,8 @@ sub get_mw_namespace_id {
 }
 
 sub get_mw_namespace_id_for_page {
-       if (my ($namespace) = $_[0] =~ /^([^:]*):/) {
+       my $namespace = shift;
+       if ($namespace =~ /^([^:]*):/) {
                return get_mw_namespace_id($namespace);
        } else {
                return;