[Docs] Grammar tuning of the Sandbox documentation

lib/cocoapods/sandbox.rb

@@ -124,8 +124,8 @@ module Pod
       root + 'Pods.xcodeproj'
     end
 
-    # Returns the path for the directory where to store the support files of
-    # a target.
+    # Returns the path for the directory where the support files of
+    # a target are stored.
     #
     # @param  [String] name
     #         The name of the target.
@@ -169,22 +169,22 @@ module Pod
       root + 'Headers'
     end
 
-    # @return [Pathname] The directory where to store the downloaded sources of
-    #         the Pods.
+    # @return [Pathname] The directory where the downloaded sources of
+    #         the Pods are stored.
     #
     def sources_root
       root + 'Sources'
     end
 
-    # @return [Pathname] the path for the directory where to store the
-    #         specifications.
+    # @return [Pathname] the path for the directory where the
+    #         specifications are stored.
     #
     def specifications_root
       root + 'Local Podspecs'
     end
 
-    # @return [Pathname] The directory where to store the files generated by
-    #         CocoaPods to support the umbrella targets.
+    # @return [Pathname] The directory where the files generated by
+    #         CocoaPods to support the umbrella targets are stored.
     #
     def target_support_files_root
       root + 'Target Support Files'