It was noted by @josh that doing this trick (copying an expression and pasting it to a place that would NOT let you construct that same expression) is unsupported behavior and subject to breakage.
I had mused about this here:
And Josh explains why this is a no-no here:
I know this isn’t helpful to you now, @antony , but wanted to point this out to other intermediate to advanced Bubblers as a warning.
