fix(render): reject empty tag paths, sharpen the raw-form test

F1: test_no_raw_or_partial_form's first assertion only excluded one
literal shape (Ok [Var ["{name"]]), so it could not actually catch a
future raw/unescaped constructor under a different name. Replace it
with an assertion of the real parse result for {{{name}}}
(Ok [Var ["{name"]; Text "}"]), documented behaviour rather than a
guarantee this test cannot check -- the real guarantee is structural:
node has exactly four constructors and none of them is raw.

F2: {{.}}, {{#}}, {{^}} and {{/}} used to parse to a Var/Section/
Inverted with an empty path, reachable but never designed. This engine
has no "current context" for a bare dot to mean, so a bare-dot or
empty-sigil path is now a parse error at lex time, covering all four
sigil forms via one path helper. The existing "empty tag {{}}" branch
is unchanged and still reachable (a fully empty body is a distinct
case from a sigil with an empty path).

0 files changed, 0 insertions, 0 deletions