Match expressions doesn't need always to be terminated by a semicolon

[driade]

I'm not sure if this PR is important for the documentation, but "match" doesn't always need to be terminated by a semicolon.

I've learned this today :)

[driade]

Some examples

driade/phpfmt8@d5e484b#diff-f9724eb0e73ef20a68d492baa1516f2c47019efdda7bd213ee856d0a8a045724

[kamil-tekiela]

Some expressions can be considered as statements. In this case, a statement has the form of 'expr ;' that is, an expression followed by a semicolon. In $b = $a = 5;, $a = 5 is a valid expression, but it's not a statement by itself. $b = $a = 5;, however, is a valid statement.

https://www.php.net/manual/en/language.expressions.php

I'm not sure why we repeat that information on the match page. Perhaps it should be removed instead of expanded.

[Girgias]

I think just rephrasing the existing note to

When a match expression is used as a standalone expression it must be terminated by a semicolon.

Covers the nuance just fine without needing to add examples.

You could use a match expression as a function argument, and you don't need a semi colon there either.

[driade]

Here we go then!