what: print filenames unconditionally

* Print name once per file argument, including files containing zero matches
* Empty filename '' is generally invalid and would fail earlier in open()

Author: mknos

bin/what

@@ -44,7 +44,7 @@ sub printWhat
     my $file_name   = shift;
     my $stop_flag   = shift;
     my $line;
-    print "$file_name:\n" if $file_name ne "";
+    print "$file_name:\n";
     while (defined($line = <$file_handle>))
     {
         next unless $line =~ m/\@\(#\)/;