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Changes between Initial Version and Version 1 of Ticket #39153, comment 7

initial	v1
2	2
3	3	Try to compile a list of inputs and expected outputs. Each case should be really tiny, demonstrating a specific scenario that regular expression goes through.
	4
	5	It is, however, tested via functions and methods that call it, so I'm pretty sure your patch will fail some of the shortcodes tests.