[tf.data] Document how lists are treated as tensors instead of nested structure.
[tf.data] Document how lists are treated as tensors instead of nested structure.

PiperOrigin-RevId: 305714634
Change-Id: I3ff9d0f1845c5b6511e54d89aee51783d015279d

yongtang/tensorflow,yongtang/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_saved_model,davidzchen/tensorflow,Intel-tensorflow/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_tf_optimizer,aldian/tensorflow,frreiss/tensorflow-fred,gautam1858/tensorflow,sarvex/tensorflow,aldian/tensorflow,tensorflow/tensorflow,paolodedios/tensorflow,frreiss/tensorflow-fred,davidzchen/tensorflow,tensorflow/tensorflow,davidzchen/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,gunan/tensorflow,aldian/tensorflow,petewarden/tensorflow,davidzchen/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,gunan/tensorflow,yongtang/tensorflow,petewarden/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow,cxxgtxy/tensorflow,sarvex/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,gunan/tensorflow,Intel-tensorflow/tensorflow,sarvex/tensorflow,tensorflow/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow-pywrap_saved_model,karllessard/tensorflow,freedomtan/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,cxxgtxy/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,gunan/tensorflow,Intel-Corporation/tensorflow,aam-at/tensorflow,karllessard/tensorflow,karllessard/tensorflow,cxxgtxy/tensorflow,petewarden/tensorflow,Intel-tensorflow/tensorflow,cxxgtxy/tensorflow,paolodedios/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-experimental_link_static_libraries_once,yongtang/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_saved_model,davidzchen/tensorflow,gautam1858/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,yongtang/tensorflow,annarev/tensorflow,petewarden/tensorflow,davidzchen/tensorflow,aldian/tensorflow,cxxgtxy/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,gunan/tensorflow,freedomtan/tensorflow,paolodedios/tensorflow,freedomtan/tensorflow,annarev/tensorflow,gautam1858/tensorflow,davidzchen/tensorflow,freedomtan/tensorflow,freedomtan/tensorflow,frreiss/tensorflow-fred,gautam1858/tensorflow,gunan/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow,Intel-tensorflow/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,paolodedios/tensorflow,annarev/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,freedomtan/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,Intel-Corporation/tensorflow,Intel-Corporation/tensorflow,aam-at/tensorflow,karllessard/tensorflow,aam-at/tensorflow,gunan/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,gautam1858/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,freedomtan/tensorflow,tensorflow/tensorflow,gunan/tensorflow,frreiss/tensorflow-fred,aldian/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow,annarev/tensorflow,yongtang/tensorflow,petewarden/tensorflow,aam-at/tensorflow,freedomtan/tensorflow,yongtang/tensorflow,petewarden/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_tf_optimizer,gautam1858/tensorflow,aldian/tensorflow,karllessard/tensorflow,annarev/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,sarvex/tensorflow,petewarden/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow,cxxgtxy/tensorflow,aam-at/tensorflow,aam-at/tensorflow,sarvex/tensorflow,karllessard/tensorflow,annarev/tensorflow,karllessard/tensorflow,tensorflow/tensorflow,aam-at/tensorflow,paolodedios/tensorflow,davidzchen/tensorflow,gautam1858/tensorflow,davidzchen/tensorflow,frreiss/tensorflow-fred,gunan/tensorflow,Intel-Corporation/tensorflow,Intel-tensorflow/tensorflow,Intel-Corporation/tensorflow,karllessard/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,aldian/tensorflow,gunan/tensorflow,tensorflow/tensorflow-pywrap_saved_model,frreiss/tensorflow-fred,paolodedios/tensorflow,aam-at/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-pywrap_saved_model,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,gunan/tensorflow,tensorflow/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,cxxgtxy/tensorflow,freedomtan/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,yongtang/tensorflow,sarvex/tensor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