Go patch committed: Fix handling of ^'a'

This patch from Rémy Oudompheng fixes the handling of ^'a' or -'^' in the Go frontend. It used to crash, rather than computing the appropriate value. Bootstrapped and ran Go testsuite on x86_64-unknown-linux-gnu. Committed to mainline and 4.7 branch. Ian <#part type="text/x-diff" filename="~/f

Go patch committed: Fix handling of ^'a'

This patch from Rémy Oudompheng fixes the handling of ^'a' or -'^' in the Go frontend. It used to crash, rather than computing the appropriate value. Bootstrapped and ran Go testsuite on x86_64-unknown-linux-gnu. Committed to mainline and 4.7 branch. Ian <#part type="text/x-diff" filename="~/f