checks an :api element for unresolved namespaces and entries

(check-api-element {:lookup {}} {:type :api :namespace “std.lib.missing”}) => {:type :missing-namespace :namespace ’std.lib.missing}

checks a single prepared element, returning a vector of issues

checks pages and returns the total number of issues found

(check-failures :all) (check-failures ’core xt)

checks a single documentation page for unresolved and failing elements

issues are returned as a vector of maps with :page, :type and details. when :eval is set in params, page facts are executed and failures are reported as :failed-test issues

checks a :reference element for the missing reference placeholder

makes an env for code.doc check tasks

selects page keys from the lookup given task input