[tz] Proposal to restrict field separator to tab

[random832 at fastmail.us]

On Mon, Sep 16, 2013, at 6:58, Lester Caine wrote:

> That said, I am using the tab on these lines to indicate how that line is 
> handled, so a space there would cause a problem anyway, and I drop the
> 'extra' 
> field to line things up again ...

Why do you need something there to show how the line is handled? It's a
continuation line because it's immediately after a zone/continuation
line that doesn't have a termination date. As I understand the format,
it's completely valid to have a continuation line with _no_ leading
whitespace.