Writes the same byte many times, performing the underlying write call as many times as necessary.
pub fn splatByteAll(w: *Writer, byte: u8, n: usize) Error!void
pub fn splatByteAll(w: *Writer, byte: u8, n: usize) Error!void {
var remaining: usize = n;
while (remaining > 0) remaining -= try w.splatByte(byte, remaining);
}