Fix sphinx/build_docs warnings for data_structures/binary_tree/mirror_binary_tree#12470

cclauss merged 2 commits intoTheAlgorithms:masterTheAlgorithms/Python:masterfrom

MaximSmolskiy:fix-sphinx/build_docs-warning-for-data_structures/binary_tree/mirror_binary_treeMaximSmolskiy/Python:fix-sphinx/build_docs-warning-for-data_structures/binary_tree/mirror_binary_treeCopy head branch name to clipboard