fix incorrect wrapping in quote-syntax #332

Job	Run time
ci (tpb, ubuntu-22.04, --pb --threads --enable-libffi, test-some-fast)	6m 33s
ci (a6osx, macos-12)	12m 52s
ci (ta6osx, macos-12)	5m 23s
ci (arm64osx, macos-14)	9m 1s
ci (tarm64osx, macos-14)	2m 45s
ci (i3le, ubuntu-22.04)	11m 21s
ci (ti3le, ubuntu-22.04)	9m 57s
ci (a6le, ubuntu-22.04)	9m 1s
ci (ta6le, ubuntu-22.04, CFLAGS+=-std=gnu89)	12m 9s
ci (ta6le, ubuntu-22.04, reboot, -m=ta6le --force, re.boot SCHEME="chezscheme", test-some-fast)	8m 12s
ci (i3nt, windows-2022, vs)	11m 19s
ci (ti3nt, windows-2022, vs)	8m 23s
ci (a6nt, windows-2022, vs)	12m 5s
ci (ta6nt, windows-2022, vs)	12m 57s
ci (ta6nt, windows-2022, gcc, CFLAGS+=-std=gnu89)	13m 15s
	2h 25m 13s

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