Normalize expression variables #873

Job	Run time
checkstyle	3m 30s
copyright	3m 18s
shellcheck	3m 6s
build	5m 6s
spotbugs	5m 52s
javadoc	4m 4s
tests/linker-linux	3m 9s
vscode-ext	3m 55s
tests/others-linux	3m 23s
tests/archetype-linux	3m 9s
tests/cli-linux	3m 8s
tests/cli-functional-linux	3m 10s
tests/cli-windows	3m 10s
tests/cli-functional-windows	3m 10s
tests/archetype-windows	3m 6s
cli/linux-amd64	5m 39s
cli/darwin-amd64	6m 11s
tests/linker-windows	3m 11s
tests/others-windows	3m 11s
cli/windows-amd64	6m 6s
cli/binaries	7s
tests/results	0s
gate	0s
	1h 18m 41s

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