message: Manual: Mention behavior of scopes and functions
diff: @@ -23,6 +23,27 @@ if test 1 == 1
  # end of scope, y is deleted since it's owned by it
  end
  -echo "$x" # prints 2
  -echo "$y" # prints nothing, y is deleted already
  +echo $x # prints 2
  +echo $y # prints nothing, y is deleted already
  +```
  +
  +## Functions
  +
  +Functions have the scope they were defined in.
  +This ensures they don't use any unintended local variables that only work in some cases.
  +Once again, this matches the behavior of most other languages, apart from perhaps LOLCODE.
  +
  +```ion
  +let x = 5 # defines x
  +
  +fn print_vars
  + echo $x # prints 2 because it was updated before the function was called
  + echo $y # prints nothing, y is owned by another scope
  +end
  +
  +if test 1 == 1
  + let x = 2 # updates existing x
  + let y = 3 # defines y
  + print_vars
  +end
  ```
  