or NAN
		  %e	floating point number as 1.23e3, inf, -inf or nan
		  %E	floating point number as 1.23E3, INF, -INF or NAN
		  %g	floating point number, as %f or %e depending on value
		  %G	floating point number, as %F or %E depending on value
		  %%	the % character itself
		  %p	representation of the pointer to the container

		Conversion specifications start with '%' and end with the
		conversion type.  All other characters are copied unchanged to
		the result.

		The "%" starts a conversion specification.  The following
		arguments appear in sequence:

			% [pos-argument] [flags] [field-width] [.precision] type

		pos-argument
			At most one positional argument specifier. These
			take the form {n$}, where n is >= 1.

		flags
			Zero or more of the following flags:

		    #	      The value should be converted to an "alternate
			      form".  For c, d, and s conversions, this option
			      has no effect.  For o conversions, the precision
			      of the number is increased to force the first
			      character of the output string to a zero (except
			      if a zero value is printed with an explicit
			      precision of zero).
			      For x and X conversions, a non-zero result has
			      the string "0x" (or "0X" for X conversions)
			      prepended to it.

		    0 (zero)  Zero padding.  For all conversions the converted
			      value is padded on the left with zeros rather
			      than blanks.  If a precision is given with a
			      numeric conversion (d, o, x, and X), the 0 flag
			      is ignored.

		    -	      A negative field width flag; the converted value
			      is to be left adjusted on the field boundary.
			      The converted value is padded on the right with
			      blanks, rather than on the left with blanks or
			      zeros.  A - overrides a 0 if both are given.

		    ' ' (space)  A blank should be left before a positive
			      number produced by a signed conversion (d).

		    +	      A sign must always be placed before a number
			      produced by a signed conversion.  A + overrides
			      a space if both are used.

		field-width
			An optional decimal digit string specifying a minimum
			field width.  If the converted value has fewer bytes
			than the field width, it will be padded with spaces on
			the left (or right, if the left-adjustment flag has
			been given) to fill out the field width.  For the S
			conversion the count is in cells.

		.precision
			An optional precision, in the form of a period '.'
			followed by an optional digit string.  If the digit
			string is omitted, the precision is taken as zero.
			This gives the minimum number of digits to appear for
			d, o, x, and X conversions, the maximum number of
			bytes to be printed from a string for s conversions,
			or the maximum number of cells to be printed from a
			string for S conversions.
			For floating point it is the number of digits after
			the decimal point.

		type
			A character that specifies the type of conversion to
			be applied, see below.

		A field width or precision, or both, may be indicated by an
		asterisk "*" instead of a digit string.  In this case, a
		Number argument supplies the field width or precision.  A
		negative field width is treated as a left adjustment flag
		followed by a positive field width; a negative precision is
		treated as though it were missing.  Example: >vim
			echo printf("%d: %.*s", nr, width, line)
<		This limits the length of the text used from "line" to
		"width" bytes.

		If the argument to be formatted is specified using a
		positional argument specifier, and a '*' is used to indicate
		that a number argument is to be used to specify the width or
		precision, the argument(s) to be used must also be specified
		using a {n$} positional argument specifier. See |printf-$|.

		The conversion specifiers and their meanings are:

				*printf-d* *printf-b* *printf-B* *printf-o* *printf-x* *printf-X*
		dbBoxX	The Number argument is converted to signed decimal (d),
			unsigned