(List
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('test_description', {[SQ <LIT_CHARS "histogram diff algorithm">]})])
  (Com {[LIT_CHARS .]} {[LIT_CHARS ./test-lib.sh]})
  (Com {[LIT_CHARS .]} {[DQ [VarSub TEST_DIRECTORY]] [LIT_CHARS /lib-diff-alternative.sh]})
  (Com {[LIT_CHARS test_diff_frobnitz]} {[DQ [LIT_CHARS histogram]]})
  (Com {[LIT_CHARS test_diff_unique]} {[DQ [LIT_CHARS histogram]]})
  (Com {[LIT_CHARS test_done]})
)