Tree-sitter documentation

[Yuan Fu]

> This function takes a series of @var{query-spec}s, which are triplets
> @w{@code{@var{:keyword} @var{value} @dots{} @var{query}}}.  Each
> @var{query} is a tree-sitter query in either the string, s-expression
> or compiled form.
> 
Is is ok to use “triplets” here? Because there can be more than one pair of 
:keyword and values before a query, eg,

:keyword value
:keyword value
query


Yuan