-/* Write formatted output to a string dynamically allocated with malloc().
- If the memory allocation succeeds, store the address of the string in
- *RESULT and return the number of resulting bytes, excluding the trailing
- NUL. Upon [ENOMEM] memory allocation error, call xalloc_die.
+/* Write formatted output to a string dynamically allocated with malloc(),
+ and return it. Upon [ENOMEM] memory allocation error, call xalloc_die.