favor return over return _ (void return); newline/closing terminates

TODO.md

@@ -733,8 +733,8 @@
     (needs string building), struct field defaults to drop `&[]` on empty lists
 
 29. fix bugs (implemented)
-  - `return _` was already the supported empty return for void functions; the original
-    bare-`return` report was stale
+  - bare `return` is the empty return for void functions; `yield` always requires a
+    same-line, non-void value because `break` handles valueless scope exits
   - catch value blocks may end by returning from the function instead of yielding when
     every path exits
   - implicit-conversion diagnostics render source-level composite and named types instead
@@ -834,6 +834,8 @@
   - add `debug.print` function making use of `std/io` to print values to the console
   - this may either require native variadic arguments or a tuple value to like zig's approach (consider pros and cons) 
 
+38. consider renaming `ptr_cast` to `ptrcast`
+
 ## A word on unchecked casts
 
 For casts that bypass safety checks, Honey provides builtin functions: