busybox/shell/hush_test/hush-quoting/squote_in_varexp.tests

x=yz
echo ${x#'y'}
echo "${x#'y'}"
echo ${x#"y"}
echo "${x#"y"}"
echo ${x%'z'}
echo "${x%'z'}"
echo ${x%"z"}
echo "${x%"z"}"
echo Ok:$?