Add troubleshooting section to testing docs
Add troubleshooting section to testing docs

exercism/xperl6,exercism/xperl6,mienaikage/xperl6,mienaikage/exercism-perl6,mienaikage/exercism-perl6,mienaikage/xperl6,exercism/xperl6,mienaikage/xperl6,mienaikage/exercism-perl6