GSED 4.+ supports the \L& and \U& switches to transform everything to lowercase or uppercase respectively:
sed 's/MyRegExp/\L&/g'
changes the regular expression MyRegExp into lowercase.
GSED 4.+ supports the \L& and \U& switches to transform everything to lowercase or uppercase respectively:
sed 's/MyRegExp/\L&/g'
changes the regular expression MyRegExp into lowercase.