[rob74]

...not if you live and breathe shell scripts, no. But most people coming from other programming languages first need to understand the concept of whitespace being significant, and even if they do, it's easy to insert a space accidentally. In this case, if you get this error message, you would probably first look at the part in the "$(...)" (which, you think, is the only thing resembling a "command" on that line) and wonder why on earth it doesn't work, overlooking the problem slightly to the left of it.

[naniwaduni]

I would expect to look at the part inside the $(), probably attempt to run it to confirm that it's working at all, and be a bit curious as to why the error message implies I was trying to run the output of that command!

[blueflow]

I remember yaml and python also having syntactically relevant whitespaces.