URL containing tilde included in help text doesn't work when clicked

[brianharvey]

For example, this help screen is in the streams library: The second link, next to the last line, is https://people.eecs.berkeley.edu/~bh/61a-pages/Volume2/notes.pdf If you click it here, on the Github issue page, you'll get to my lecture notes. But if you click it in this project (find the MAP OVER STREAM block and get its help screen) it won't work.

I'm using Chrome on MacOS.

[DarDoro]

"~"

is ignored in regexp and breaks the URL parsing at

morphic.js

function isURLChar(aCharacter) {
    return aCharacter.match(/[A-z0-9./:?&_+%-]/);
}