message: Update README To Display Explicit Array Syntax
diff: @@ -244,12 +244,27 @@ let lsflags = [ -l -a ]
  ls @lsflags
  ```
  -#### Braces Create Arrays
  +### Copying Arrays
  +
  +Do note, however, that arrays must always be explicitly created with **[]**.
  +
  +```ion
  +let array = [ 1 2 3 ]
  +let copy_of_array = [ @array ]
  +```
  +
  +```ion
  +let string = @array
  +```
  +
  +When an array variable is passed by itself, it will coerced into a string.
  +
  +#### Braces Can Create Arrays
  Brace expansions actually create a vector of values under the hood, and thus they can be used to create an array.
  ```ion
  -let braced_array = {down,up}vote
  +let braced_array = [ ]{down,up}vote ]
  ```
  #### Array-based Command Substitution
  @@ -258,7 +273,7 @@ Whereas the standard command substitution syntax will create a single string fro
  a whitespace-delimited vector of values from the output of the command.
  ```ion
  -let word_split_process = @(echo one two three)
  +let word_split_process = [ @(echo one two three) ]
  ```
  ### Using Arrays
  