fix (expr): add never-type note to expressions. #1875
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Not all expressions evaluate to a value. Examples are
return,loop,break. This is described for infiniteloops but not as a statement applicable to a subset of the expressions.After some consideration and reading the
authoring.mda "> [!Note]" was added instead of a standalone paragraph. It becomes more of a detail for careful readers.The first two paragraphs are nearly identical to the original document. The only word removed from the initial paragraph is always because that's not true, and would trip some users up.
It links to the reference
!but another useful link could be std !. That would make both the text longer, and link to a page that starts with "this is unstable". So the latter was left out.