# inconsistency with quoted pattern substitution patterns through bash-4.2
# fixed in a ksh93-compatible (and Posix-compatible, in general) way
# NOT backwards compatible

test="weferfds'dsfsdf"

# why does this work, this list was born of frustration, I tried
# everything I could think of.
echo \'${test//"'"/\'\\\'\'}\'" "

#but none of the following

echo "'${test//"'"/}'"

echo "'${test//"'"/"'\\''"}'"

echo "'${test//"'"/\'\\'\'}'"

#echo "'${test//'/}'"   # hangs waiting for '
#echo "'${test//"'"/'\\''}'" # hangs waiting for '

unset test
test=teststrtest
echo "${test//str/"dd dd"}"
echo ${test//str/"dd '\''dd"}

unset test
test=teststring

echo "${test//str/"dddd"}"

echo ${test//str/"dddd"}

echo ${test//str/"'"}

echo "${test//str/"'"}"

#echo "${test//str/'}"   # hangs

test=test\'string
echo "${test//"'"/"'"}"

x="a'b'c"; echo "${x//\'/\'}"

printf '%s\n' "foo ${IFS+"b   c"} baz"

# this is where the default behavior differs from posix
set -o posix
echo "foo ${IFS+'bar} baz"