fix .travis.yml

.travis.yml

@@ -2,8 +2,8 @@
   language: objective-c
 
   before_script:
-	- brew update
-	- brew install xctool
-	
+    - brew update
+    - brew install xctool
+
   script:
-	- xctool -workspace Masonry -scheme Masonry build test
+    - xctool -workspace Masonry -scheme Masonry build test