[PATCH 1/3] lib/string_helpers: Consolidate yesno() implementation

[David Laight]

> > > > +static inline const char *yesno(bool v) { return v ? "yes" : "no"; }
> 
> 	return "yes\0no" + v * 4;
> 
> :-)

except '"no\0\0yes" + v * 4' works a bit better.

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