support horizontal rule

[garfieldnate]

In the tables I'm generating, I have several sections. It would useful to be able to add a separator between these sections.

[JakeWharton]

And you don't want to use separate tables because you want all of their columns to align?

Do you have an example output that you think would make sense so I can get an idea of what you mean exactly?

[garfieldnate]

Yep, I'd like all of the columns to align. The context is that I'm porting a Perl project to Java. Here's the printout I have from the Perl module: https://metacpan.org/source/NGLENN/Algorithm-AM-3.11/t%2F04-Result.t#L223; the *** lines are rules (I use https://metacpan.org/pod/Text::Table, which provides a rule method). I know this one is ugly; I think Picnic can do better using the unicode box drawing characters, since there are already characters available for double lines or, probably a better choice, bold lines (U+251D, etc.).

My current printout with picnic is as follows:

┌────────────┬──────────┬───────────┬───────┬─────────┐
│ Percentage │ Pointers │ Num Items │ Class │ Context │
├────────────┼──────────┼───────────┼───────┼─────────┤
│    %61.538 │        8 │         2 │       │   3 1 * │
├────────────┼──────────┼───────────┼───────┼─────────┤
│    %30.769 │        4 │         1 │     e │         │
│            │          │           │       │   3 1 0 │
│    %30.769 │        4 │         1 │     r │         │
│            │          │           │       │   3 1 1 │
├────────────┼──────────┼───────────┼───────┼─────────┤
│    %23.077 │        3 │         1 │       │   * 1 2 │
├────────────┼──────────┼───────────┼───────┼─────────┤
│    %23.077 │        3 │         1 │     r │         │
│            │          │           │       │   2 1 2 │
├────────────┼──────────┼───────────┼───────┼─────────┤
│    %15.385 │        2 │         1 │       │   * * 2 │
├────────────┼──────────┼───────────┼───────┼─────────┤
│    %15.385 │        2 │         1 │     r │         │
│            │          │           │       │   0 3 2 │
└────────────┴──────────┴───────────┴───────┴─────────┘

The rows with 3 1 *, * 1 2 and * * 2 in the Context column are meant to start their own sections in the table.