================================================================================
Comment in namespace
================================================================================

namespace eval ::ns {
    # command
}

--------------------------------------------------------------------------------

(source_file
  (namespace
    (word_list
      (simple_word)
      (simple_word)
      (braced_word
        (comment)))))

================================================================================
Namespace id
================================================================================

set a $::var
set a $::var::sub

--------------------------------------------------------------------------------

(source_file
  (set (id) (variable_substitution (id)))
  (set (id) (variable_substitution (id)))
)
