help: still print 0-length argument descriptions

I think I had initially intended 0-length descriptions to be "hidden"
options, but this doesn't really work well with arguments, and it also
doesn't make intention clear. Perhaps an additional field should be
added to the parameter specification to support hiding options
(this does not make sense for non-named options).

source/help.zig

@@ -53,6 +53,8 @@ pub fn StructuredPrinter(comptime Writer: type) type {
             // TODO: lol return a real error
             if (indent >= self.wrap_width) return NoclipError.UnexpectedFailure;
 
+            if (text.len == 0) return;
+
             // this assumes output stream has already had the first line properly
             // indented.
             var splitter = std.mem.split(u8, text, "\n");
@@ -227,8 +229,6 @@ pub fn HelpBuilder(comptime command: anytype) type {
 
             var just: usize = 0;
             inline for (comptime help_info.arguments) |arg| {
-                if (comptime arg.description.len == 0) continue;
-
                 const pair: AlignablePair = .{
                     .left = arg.name,
                     .right = arg.description,