Allow void macro result (#11286)

* allow void macro result
* add test for void macro result type

lib/core/macros.nim

@@ -567,7 +567,7 @@ proc quote*(bl: typed, op = "``"): NimNode {.magic: "QuoteAst", noSideEffect.}
   ##
   ## .. code-block:: nim
   ##
-  ##   macro check(ex: untyped): typed =
+  ##   macro check(ex: untyped) =
   ##     # this is a simplified version of the check macro from the
   ##     # unittest module.
   ##

lib/pure/pegs.nim

@@ -572,7 +572,7 @@ when not useUnicode:
   proc isTitle(a: char): bool {.inline.} = return false
   proc isWhiteSpace(a: char): bool {.inline.} = return a in {' ', '\9'..'\13'}
 
-template matchOrParse(mopProc: untyped): typed =
+template matchOrParse(mopProc: untyped) =
   # Used to make the main matcher proc *rawMatch* as well as event parser
   # procs. For the former, *enter* and *leave* event handler code generators
   # are provided which just return *discard*.

lib/system/assertions.nim

@@ -71,7 +71,7 @@ template onFailedAssert*(msg, code: untyped): untyped {.dirty.} =
     let msg = msgIMPL
     code
 
-template doAssertRaises*(exception: typedesc, code: untyped): typed =
+template doAssertRaises*(exception: typedesc, code: untyped) =
   ## Raises ``AssertionError`` if specified ``code`` does not raise the
   ## specified exception. Example:
   ##