new pop-up example

[CodeBarker]

Nice,

My only suggestion would be to make a note that the expression name will be different eg. {expression/timesince}

Any expression added through the website will be in the format {expression/expr}

[RebeccaLeh]

thanks for your helpful comments @ekenes and @CodeBarker

[ekenes]

@RebeccaLeh Did you intend to close the PR, or do you want us to merge it?

[RebeccaLeh]

@ekenes meant to merge!