fix: changing to new multiline string format that doesn't use string.Format()
fix: changing to new multiline string format that doesn't use string.Format()

vintage-software/cases#114

original commit: vintage-software/vstack@64cd7d48853cd3d7a3f23fb8284fab724848859c

split from 67398e282445743e06f95331e01e09b04f5c271b

vintage-software/vstack