Use an inner node class to override the text representation #76

Job	Run time
i686-pc-windows-msvc/msvc (Debug)	18m 30s
i686-pc-windows-msvc/msvc (Release)	22m 49s
x86_64-pc-windows-msvc/msvc (Debug)	19m 17s
x86_64-pc-windows-msvc/msvc (Release)	23m 10s
aarch64-pc-windows-msvc/msvc (Debug)	5m 21s
aarch64-pc-windows-msvc/msvc (Release)	6m 14s
x86_64-apple-darwin/clang (Debug)	13m 58s
x86_64-apple-darwin/clang (Release)	16m 35s
aarch64-apple-darwin/clang (Debug)	11m 16s
aarch64-apple-darwin/clang (Release)	14m 46s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 32s
x86_64-unknown-linux-gnu/gcc (Release)	12m 50s
x86_64-unknown-linux-gnu/clang (Debug)	8m 12s
x86_64-unknown-linux-gnu/clang (Release)	10m 52s
aarch64-unknown-linux-gnu/gcc (Debug)	1h 10m 4s
aarch64-unknown-linux-gnu/gcc (Release)	47m 59s
aarch64-unknown-linux-gnu/clang (Debug)	1h 3m 16s
aarch64-unknown-linux-gnu/clang (Release)	35m 58s
	6h 49m 39s

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