*
* Use: As for @dstr_putf@, but may be used as a back-end to user-
* supplied functions with @printf@-style interfaces.
*
* Use: As for @dstr_putf@, but may be used as a back-end to user-
* supplied functions with @printf@-style interfaces.
*
* Use: Writes a piece of text to a dynamic string, doing @printf@-
* style substitutions as it goes. Intended to be robust if
*
* Use: Writes a piece of text to a dynamic string, doing @printf@-
* style substitutions as it goes. Intended to be robust if