Updating default argument operator

Author: jwarwick

crash-course.markdown

@@ -565,7 +565,7 @@ sum "a", "b"
 In addition, Elixir allows for default values for arguments, whereas Erlang does not.
 
 ```elixir
-def mul_by(x, n // 2) do
+def mul_by(x, n \\ 2) do
   x * n
 end
 

getting_started/3.markdown

@@ -129,7 +129,7 @@ Named functions also support default arguments:
 
 ```elixir
 defmodule Concat do
-  def join(a, b, sep // " ") do
+  def join(a, b, sep \\ " ") do
     a <> sep <> b
   end
 end
@@ -142,7 +142,7 @@ Any expression is allowed to serve as a default value, but it won't be evaluated
 
 ```elixir
 defmodule DefaultTest do
-  def dowork(x // IO.puts "hello") do
+  def dowork(x \\ IO.puts "hello") do
     x
   end
 end
@@ -160,7 +160,7 @@ If a function with default values has multiple clauses, it is recommended to cre
 
 ```elixir
 defmodule Concat do
-  def join(a, b // nil, sep // " ")
+  def join(a, b \\ nil, sep \\ " ")
 
   def join(a, b, _sep) when nil?(b) do
     a
@@ -185,7 +185,7 @@ defmodule Concat do
     a <> b
   end
 
-  def join(a, b, sep // " ") do
+  def join(a, b, sep \\ " ") do
     IO.puts "***Second join"
     a <> sep <> b
   end

getting_started/6.markdown

@@ -124,7 +124,7 @@ As you can see, invoking `h()` prints the documentation of `IEx.Helpers`. From t
 
 ```iex
 iex> h(c/2)
-* def c(files, path // ".")
+* def c(files, path \\ ".")
 ...
 :ok
 ```