subs 3rd arg should be exclusive-end, not number of chars from start

[frenchy64]

;; jank
clojure.core=> (subs "abcde" 1 4)
"bcde"
clojure.core=> (subs "abcde" 1 1)
"b"
clojure.core=> (subs "asdf" 3 1)
"f"

;; clojure
user=> user=> (subs "abcde" 1 4)
"bcd"
user=> (subs "abcde" 1 1)
""
user=> (subs "asdf" 3 1)
Execution error (StringIndexOutOfBoundsException) at jdk.internal.util.Preconditions$1/apply (Preconditions.java:55).
Range [3, 1) out of bounds for length 4

;; from clojure-test

FAIL in (nil) (nil:nil)
expected: (= "bcd" (subs "abcde" 1 4))
  actual: (not (= "bcd" "bcde"))