Temporarily set prefer_single_line=True for testing #624

Job	Run time
Lint Dockerfiles (Dockerfile-fedora34)	9s
Lint Dockerfiles (Dockerfile-fedora30)	12s
Lint Dockerfiles (Dockerfile-fedora42)	6s
Lint Dockerfiles (Dockerfile-fedora38)	10s
Lint Dockerfiles (Dockerfile-fedora36)	9s
Lint Dockerfiles (Dockerfile-fedora32)	12s
Lint Dockerfiles (Dockerfile-fedora40)	9s
Lint Dockerfiles (Dockerfile-fuzz)	10s
Test Windows (3.8)	1m 30s
Test Windows (3.10)	1m 8s
Test Windows (3.13)	48s
Test Windows (3.11)	48s
Test Windows (2.7)	1m 43s
Test Windows (3.7)	1m 41s
Test Windows (3.14)	1m 53s
Test Windows (3.12)	51s
Test (python2.7)	27s
Test Windows (3.9)	48s
Test (python3.13)	44s
Test (python3.11)	34s
Test (python3.4)	34s
Test (python3.8)	25s
Test (python3.9)	30s
Test (python3.12)	44s
Test (python3.10)	44s
Test Windows (3.6)	1m 11s
Test (python3.14)	52s
Test (python3.7)	28s
Test (pypy)	1m 7s
Test (python3.6)	31s
Test (python3.5)	31s
Test (python3.3)	52s
Test (pypy3)	1m 20s
Lint Dockerfiles (Dockerfile-fedora28)	10s
Linting	12s
Coverage Report	18s
	24m 41s

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