Quote -C paths

lib/cocoapods/command/repo/push.rb

@@ -96,7 +96,7 @@ module Pod
         # specs to the master repo.
         #
         def check_if_master_repo
-          remotes = `git -C #{repo_dir} remote -v 2>&1`
+          remotes = `git -C "#{repo_dir}" remote -v 2>&1`
           master_repo_urls = [
             'git@github.com:CocoaPods/Specs.git',
             'https://github.com/CocoaPods/Specs.git',
@@ -145,7 +145,7 @@ module Pod
         # @return [void]
         #
         def check_repo_status
-          clean = `git -C #{repo_dir} status --porcelain  2>&1` == ''
+          clean = `git -C "#{repo_dir}" status --porcelain  2>&1` == ''
           raise Informative, "The repo `#{@repo}` at #{UI.path repo_dir} is not clean" unless clean
         end
 
@@ -155,7 +155,7 @@ module Pod
         #
         def update_repo
           UI.puts "Updating the `#{@repo}' repo\n".yellow
-          UI.puts `git -C #{repo_dir} pull 2>&1`
+          UI.puts `git -C "#{repo_dir}" pull 2>&1`
         end
 
         # Commits the podspecs to the source, which should be a git repo.
@@ -206,7 +206,7 @@ module Pod
         #
         def push_repo
           UI.puts "\nPushing the `#{@repo}' repo\n".yellow
-          UI.puts `git -C #{repo_dir} push origin master 2>&1`
+          UI.puts `git -C "#{repo_dir}" push origin master 2>&1`
         end
 
         #---------------------------------------------------------------------#