(List
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('kdir', {[VarSub 1 test_op=VS_TEST_COLON_HYPHEN {[LIT_CHARS ..] [LIT_SLASH /] [LIT_CHARS kernel]}]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('scriptdir', {[ComSub (Com {[LIT_CHARS dirname]} {[VarSub 0]})]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('udir', {[ComSub (Com {[LIT_CHARS dirname]} {[VarSub scriptdir]})]})])
  (Pipeline
    (Com {[LIT_CHARS cat]} {[VarSub scriptdir] [LIT_CHARS /kernel-files.txt]})
    (Subshell
      (While
        (Com {[LIT_CHARS read]} {[LIT_CHARS l]} {[LIT_CHARS r]})
        (List
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('left', {[ComSub (Com {[LIT_CHARS eval]} {[LIT_CHARS echo]} {[VarSub l]})]})])
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('right', {[ComSub (Com {[LIT_CHARS eval]} {[LIT_CHARS echo]} {[VarSub r]})]})])
          (Com {[LIT_CHARS diff]} {[LIT_CHARS -up]} {[VarSub left]} {[VarSub right]})
        )
      )
    )
  )
)