usage: gofmt [flags] [path ...]
  -cpuprofile string
    	write cpu profile to this file
  -d	display diffs instead of rewriting files
  -e	report all errors (not just the first 10 on different lines)
  -l	list files whose formatting differs from gofmt's
  -r string
    	rewrite rule (e.g., 'a[b:len(a)] -> a[b:]')
  -s	simplify code
  -w	write result to (source) file instead of stdout