Add powershell environment (#8511)

OvermindDL1 · michalmuskala · commit 1492ceb27f39 · 2018-12-11T20:48:30.000+01:00
diff --git a/lib/iex/lib/iex.ex b/lib/iex/lib/iex.ex
@@ -48,6 +48,10 @@ defmodule IEx do
 
       set ERL_AFLAGS "-kernel shell_history enabled"
 
+  On Windows10 / Powershell:
+
+      $env:ERL_AFLAGS = "-kernel shell_history enabled"
+
   ## Expressions in IEx
 
   As an interactive shell, IEx evaluates expressions. This has some
