$ cat example.pl
#!/usr/bin/env perl
use HTML::FormatText;
my $string = HTML::FormatText->format_file(
    'test.html',
    leftmargin => 0, rightmargin => 50
    );
printf $string;
$ ./example.pl
Can't locate HTML/Element.pm in @INC (@INC contains: /usr/lib/perl5/site_perl /usr/share/perl5/site_perl /usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5/core_perl /usr/share/perl5/core_perl .) at /usr/share/perl5/vendor_perl/HTML/Formatter.pm line 11.
BEGIN failed--compilation aborted at /usr/share/perl5/vendor_perl/HTML/Formatter.pm line 11.
Compilation failed in require at (eval 2) line 2.
   ...propagated at /usr/share/perl5/core_perl/base.pm line 84.
BEGIN failed--compilation aborted at /usr/share/perl5/vendor_perl/HTML/FormatText.pm line 14.
Compilation failed in require at ./example.pl line 2.
BEGIN failed--compilation aborted at ./example.pl line 2.