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* The primary purpose of pcre2_next_match() is to make it much easier for PCRE2 clients to iterate over matches, without needing an advanced knowledge of regular expressions. * Secondly, we can simplify our own code by merging the three duplicate implementations of the /g global match behaviour: pcre2demo, pcre2_substitute, and pcre2test. * Thirdly, as I look closely at the issue, I can improve the documentation. * Fourthly, I would like to actually simplify the logic, removing a complex loop which makes several match attempts, swallows duplicate matches, and more. We can have identical behaviour with a simple retry using PCRE2_NOTEMPTY_ATSTART.