Bootstrap's maintainer hates the semicolon(github.com)

  var x = function() {
    // something
  }
  
  // avoid polluting global scope:
  ;(function() {
    // Some initialization.
  })()

  ;[1,2,3].forEach(...)

  var x = function() {
    // something
  }

  // avoid polluting global scope:
  !function() {
    // Some initialization.
  }()

    do a <- [1,2,3]
       b <- [4,5,6]
       return $ a + b

     do {
       a <- [1,2,3];
       b <- [4,5,6];
       return $ a + b
     }

     do { a <- [1,2,3]; b <- [4,5,6]; return $ a + b; }

     do { a <- [1,2,3]
        ; b <- [4,5,6]
        ; return $ a + b }