New answers tagged html
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Take a look at RFC 3986. It's heavy reading, but it should be the definitive source on whether or not the URL is valid.
According to that $ doesn't need to be escaped / urlencoded. But I'm not sure whether it's valid as part of a path (e.g. /$/)
The question that @csk linked to covers the special case of using $ in shell scripts. In this case, dollar ...
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