`make playwright` can't run when `make` path has spaces

[ErdaradunGaztea]

Makefile has the following entry for playwright-shiny (and similar ones for other playwright fixtures):

playwright-shiny: FORCE
	$(MAKE) playwright TEST_FILE="$(SHINY_TEST_FILE)"

Due to missing "" around $(MAKE), this fails to execute when make is installed at a path with spaces. Say, under Program Files (x86)¹.

It'll be easy to fix, and I'd be happy to make a PR. Before I do that though, I wanted to ask if the same fix should be applied to other path variables like $(TEST_FILE) whenever they don't have quotations.

PS. It isn't really a bug with Shiny but rather with its test setup, so I didn't opt for using the bug report issue template.

Footnotes

1. I'm an uncivilized brute that still hasn't moved from Windows 10. ↩

[schloerke]

I'd be curious of the solution. But if it's a drastic change, we may reject the PR.

Related: https://stackoverflow.com/questions/9838384/can-gnu-make-handle-filenames-with-spaces.

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Would using make instead of $(MAKE) be better? I don't believe we leverage the --touch, --just-print, or --question flags.

Related: https://stackoverflow.com/a/38978887