Re: [PATCH] t9700: fix test for perl older than 5.14

> Subject: t9700: fix test for perl older than 5.14
> 
> Commit d53c2c6 (mingw: fix t9700's assumption about
> directory separators, 2016-01-27) uses perl's "/r" regex
> modifier to do a non-destructive replacement on a string,
> leaving the original unmodified and returning the result.
> 
> This feature was introduced in perl 5.14, but systems with
> older perl are still common (e.g., CentOS 6.5 still has perl
> 5.10). Let's work around it by providing a helper function
> that does the same thing using older syntax.
> 
> While we're at it, let's switch to using an alternate regex
> separator, which is slightly more readable.