update Guardfile template

README.md

@@ -1,6 +1,5 @@
 Use Guard with Hydra and get super-parallel test execution! Awesome!
 
-
 Options:
 
 * `:runner_log`: The location of the runner log where output is printed

lib/guard/hydra/templates/Guardfile

@@ -1,4 +1,10 @@
 guard 'hydra' do
   # All spec files
-  watch(%r{spec/**/*_spec.rb})
+  watch(%r{^spec/**/*_spec.rb$})
+
+  # All lib files
+  watch(%r{^lib/(.*)\.rb$}) { |m| "spec/lib/#{m[1]}_spec.rb" }
+
+  # All app files for a Rails app
+  watch(%r{^app/(.*)\.rb$}) { |m| "spec/#{m[1]}_spec.rb" }
 end