/* Convert, in place, each unambiguous `\040' sequence in the NUL-terminated
string, STR, to a single space. `unambiguous' means that it must not be
immediately preceded by an odd number of backslash characters. */
/* Convert, in place, each unambiguous `\040' sequence in the NUL-terminated
string, STR, to a single space. `unambiguous' means that it must not be
immediately preceded by an odd number of backslash characters. */