docs: def fmtval(value, colorstr=None, precision=None, spacing=True, trunc=True,
             end=' '):
      ''' Formats and returns a given number according to specifications. '''
      colwidth = opts.colwidth
      # get precision
      if precision is None:
          precision = opts.precision
      fmt = '%%.%sf' % precision
  
      # format with decimal mark, separators
      result = locale.format(fmt, value, True)
  
      if spacing:
          result = '%%%ss' % colwidth % result
  
      if trunc:
          if len(result) > colwidth:   # truncate w/ellipsis
              result = truncstr(result, colwidth)
  
      # Add color if needed
      if opts.incolor and colorstr:
          return colorstr % result + end
      else:
          return result + end