Improve error message when partial has two return statements

[jmooring]

I know the return statement returns immediately regardless of conditional blocks, and that's fine. And I know the partial construct below is incorrect, and that's fine too.

The problem is that sometimes the error message is unexpected.

layouts/partials/is-even.html

{{ if (math.ModBool . 2) }}
  {{ return true }}
{{ else }}
  {{ return false }}
{{ end }}

layouts/_default/single.html

{{ if partial "is-even.html" 3 }}
  even
{{ else }}
  odd
{{ end }}

The current error message is:

executing "partials/foo.html" at <return>: wrong number of args for return: want 0 got 1

But if I call it with an even number, no errors:

{{ if partial "is-even.html" 4 }}
  even
{{ else }}
  odd
{{ end }}

The unexpected error message isn't anything new... same results with v0.55.0, where the return statement was introduced.

[abhinavs1920]

Can I work on this issue? Please assign it to me.