code: func (p *Palette) callLine(line *stack.Call, srcLen, pkgLen int, fullPath bool) string {
  	src := ""
  	if fullPath {
  		src = line.FullSrcLine()
  	} else {
  		src = line.SrcLine()
  	}
  	return fmt.Sprintf(
  		"    %s%-*s %s%-*s %s%s%s(%s)%s",
  		p.Package, pkgLen, line.Func.PkgName(),
  		p.SrcFile, srcLen, src,
  		p.functionColor(line), line.Func.Name(),
  		p.Arguments, &line.Args,
  		p.EOLReset)
  }
docs: // callLine prints one stack line.