[Repo] Fix spelling mistake.

lib/cocoapods/command/repo.rb

@@ -69,8 +69,8 @@ module Pod
         puts "\nCocoapods #{versions['last']} is available.\n".green if has_update(versions)
       end
 
-      def self.is_compatible(name)
-        dir      = Config.instance.repos_dir + name
+      def self.compatible?(name)
+        dir = Config.instance.repos_dir + name
         versions = versions(dir)
         is_compatilbe(versions)
       end

spec/functional/command/repo_spec.rb

@@ -82,11 +82,11 @@ describe "Pod::Command::Repo" do
     it "has a class method that returns if a repo is supported" do
       yaml = YAML.dump({'min' => "999.0.0"})
       File.open(versions_file, 'w') {|f| f.write(yaml) }
-      Pod::Command::Repo.is_compatible('repo1').should == false
+      Pod::Command::Repo.compatible?('repo1').should == false
 
       yaml = YAML.dump({'min' => "0.0.1"})
       File.open(versions_file, 'w') {|f| f.write(yaml) }
-      Pod::Command::Repo.is_compatible('repo1').should == true
+      Pod::Command::Repo.compatible?('repo1').should == true
     end
   end
 end