forked from amazingfate/loongoffice
The documented precondition is that index must not be greater than the length of string. Just assert that, and fix the found misuse. The added test is for in-place replacement, just in case. Change-Id: I3c545a6f0bf913fe93e2bef83ce733359c193065 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/131232 Reviewed-by: Stephan Bergmann <sbergman@redhat.com> Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com> Tested-by: Jenkins