Update runtime files
diff --git a/runtime/compiler/perl.vim b/runtime/compiler/perl.vim
index a857cae..21e384f 100644
--- a/runtime/compiler/perl.vim
+++ b/runtime/compiler/perl.vim
@@ -1,7 +1,11 @@
-" Vim Compiler File
-" Compiler: Perl syntax checks (perl -Wc)
-" Maintainer: Christian J. Robinson <heptite@gmail.com>
-" Last Change: 2019 Jul 22
+" Vim compiler file
+" Compiler: Perl syntax checks (perl -Wc)
+" Maintainer: vim-perl <vim-perl@googlegroups.com>
+" Author: Christian J. Robinson <heptite@gmail.com>
+" Homepage: https://github.com/vim-perl/vim-perl
+" Bugs/requests: https://github.com/vim-perl/vim-perl/issues
+" License: Vim License (see :help license)
+" Last Change: 2021 Nov 2
if exists("current_compiler")
finish
@@ -15,10 +19,10 @@
let s:savecpo = &cpo
set cpo&vim
-if exists('g:perl_compiler_force_warnings') && g:perl_compiler_force_warnings == 0
- let s:warnopt = 'w'
-else
+if get(g:, 'perl_compiler_force_warnings', 1)
let s:warnopt = 'W'
+else
+ let s:warnopt = 'w'
endif
if getline(1) =~# '-[^ ]*T'