#printf for moonx

Format and print data like printf(1):

moonx bobzhang/printf '%s=%d\n' answer 42
moonx bobzhang/printf '%5.2f|%-8x|%o\n' 3.14159 255 8
moonx bobzhang/printf '%s\n' one two three   # format reused per argument
moonx bobzhang/printf '\x41é\n'

Supported: the escapes \a \b \e \f \n \r \t \v \\ \" \' \NNN \0NNN \xHH\uHHHH \UHHHHHHHH \c (stop output); the conversions %s %c %b %d %i %u %o%x %X %f %e %E %g %G %% with flags -+ 0#, field width, and precision (width and precision accept *). %b interprets escapes in its argument. Numeric arguments accept decimal, 0x hex, leading-0 octal, and 'C for a character code. The format is reused until all arguments are consumed.

Float conversions use the exact decimal expansion of the double with round-half-even, matching GNU printf digit for digit. Use -- before a FORMAT that starts with -.

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