`format_checking` test can fail spuriously because `rev` no longer ships by default on some systems

[adamnovak]

The format-checking test runs this CWL file, which assumes that a rev binary is available on the system, and does not provide one via container.

cwl-v1.2/tests/formattest.cwl

Lines 1 to 20 in 551d58d

	$namespaces:
	edam: "http://edamontology.org/"
	cwlVersion: v1.2
	class: CommandLineTool
	doc: "Reverse each line using the `rev` command"
	inputs:
	input:
	type: File
	inputBinding: {}
	format: edam:format_2330
	outputs:
	output:
	type: File
	outputBinding:
	glob: output.txt
	format: edam:format_2330
	baseCommand: rev
	stdout: output.txt

In Debian and Ubuntu (between 25.10 and 26.04), the rev binary which used to be in util-linux, an extremely essential package, is now in bsdextrautils, a less essential package. In particular, that package is not installed in the Docker container ubuntu:26.04. If you docker run -ti --rm ubuntu:26.04 dpkg --list you will see that it ships bsdutils, coreutils, and util-linux, but not bsdextrautils.

The test should probably be rewritten to not assume that all CWL host platforms ship a rev binary.

[adamnovak]

This problem also affects the quoting_multiple_backslashes test, because the script there calls rev and the test is run without a container.

cwl-v1.2/tests/string-interpolation/bash-dollar-quote.cwl

Line 11 in 551d58d

"Sweet land of liberty" | rev)