cljstache_test.clj

(let [tmpl (str/join "\n" ["first"
                           ""
                           "{{#arr}}"
                           "{{val}}"
                           "{{/arr}}"
                           ""
                           "{{#arr}}"
                           "{{val}}"
                           "{{/arr}}"
                           ""
                           "last"])]
  (cljstache.core/render tmpl {:arr {:val "foo"}}))

;;; Expected
; first
;
; foo
; 
; foo
;
; last

;;; Actual
; first
;
; foo
;
; foo
; last