direnv 0.1.154

Closes Homebrew/homebrew#18826.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/direnv.rb

@@ -2,8 +2,8 @@ require 'formula'
 
 class Direnv < Formula
   homepage 'http://www.direnv.net'
-  url 'https://github.com/zimbatm/direnv/archive/v0.1.151.tar.gz'
-  sha1 '5cb7487602fa69e1c81e6448aec59336d1537baf'
+  url 'https://github.com/zimbatm/direnv/archive/v0.1.154.tar.gz'
+  sha1 '86a87d7d3c193666ffde47b1fe52dfb2847786ff'
 
   head 'https://github.com/zimbatm/direnv.git'
 
@@ -13,7 +13,7 @@ class Direnv < Formula
 
   def caveats; <<-EOS.undent
     At the END of your ~/.bashrc or ~/.zshrc, add the following line:
-      eval `direnv hook $0`
+      eval "$(direnv hook $0)"
 
     See the wiki for docs and examples:
       https://github.com/zimbatm/direnv/wiki/