In Tips and Tricks doc, expand `-s` flag
In Tips and Tricks doc, expand `-s` flag

Writing the long flag here helps the user understand what the command does. The short flag is more appropriate for interactive use of `brew`.

JCount/brew,JCount/brew,JCount/brew,Homebrew/brew,Homebrew/brew,Homebrew/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,Homebrew/brew,MikeMcQuaid/brew,nandub/brew,MikeMcQuaid/brew,nandub/brew,JCount/brew,nandub/brew,nandub/brew