ruby_defint.m4: variable names must not contain spaces #615

Job	Run time
cargo clippy	31s
cargo test	1m 46s
make (yjit-bindgen, To fix: use patch in logs, --with-gcc=clang-14 --enable-yjit=dev, /usr/lib/ll...	5m 52s
make (test-bundled-gems, --enable-yjit=dev)	26m 57s
make (check, --enable-yjit=dev, --yjit-call-threshold=1 --yjit-verify-ctx --yjit-code-gc, -T --yj...	24m 19s
make (check, --enable-yjit=dev)	16m 39s
make (check, RUSTC='rustc +1.58.0', 1.58.0)	10m 29s
YJIT Ubuntu result	3s
	1h 26m 36s

Provide feedback