the tag containing whitespaces should throw an error

[l4u]

import pystache
print pystache.render('{{ with space }}',{'with space':'content'})

Currently, this (pystache 0.5.3) works without errors.

[l4u]

In ruby's implementation, an error will occur

require 'mustache'
Mustache.render('{{ with space }}', {'with space' => 'content'})

Mustache::Parser::SyntaxError: Unclosed tag

[l4u]

Related to
mustache/spec#67
https://github.com/mustache/spec/blob/master/specs/interpolation.yml

[bobthecow]

According to the spec, that's a valid tag name. The only things that a tag name can't contain are . and the closing delimiter (and they can't start with any of the tag sigils — &, =, >, etc — unless they're inside a tag that already has a sigil, so I'd avoid starting with them regardless).

I'd consider this a bug in the Ruby implementation :)

[l4u]

An Objective-C implementation (https://github.com/groue/GRMustache) and a ruby implementation (https://github.com/mustache/mustache) do not allow spaces.
While this python implementation, or possibly your php implementation allow spaces.
I hope that someone could clarify the specs.

[bobthecow]

If you have a python dictionary or a PHP associative array with spaces in the keys, it's perfectly valid to use tags with spaces to get at them.