Escape problem for a shell command

[guorenxi]

The shell command:

latestVer=$(curl -s 'http://nginx.org/en/download.html' | sed 's/\'$'\n''</g' | sed -n '/Stableversion$/,$ p' | egrep -m1 -o '/download/nginx-.+\.tar\.gz')

was translated to:

latestVer=$(curl -s 'http://nginx.org/en/download.html' | sed 's/<!--\'$'\n''</g' | sed -n '/-->Stableversion$/,$ p' | egrep -m1 -o '/download/nginx-.+\.tar\.gz')

Any workaround?

Thanks.

[AndiDittrich]

don't forget to escape the html sequence <