Typo in CLI usage string for diff subcommand

[Mickey Reiss]

Describe the bug

I believe there is a typo here:

wire/cmd/wire/main.go

Lines 182 to 193 in 0ac8450

 func (*diffCmd) Usage() string { 
 	return `diff [packages] 
  
   Given one or more packages, diff generates the content for their wire_gen.go 
   files and outputs the diff against the existing files. 
  
   If no packages are listed, it defaults to ".". 
  
   Similar to the diff command, it returns 0 if no diff, 1 if different, 2 
   plus an error if trouble. 
 ` 
 } 

To Reproduce

Run wire diff -h.

Expected behavior

Similar to the **diff** command should probably read Similar to the **check** command

Version

0.5.0

Additional context

Add any other context about the problem here.