use === so that regular expressions are not required

activesupport/lib/active_support/file_watcher.rb

@@ -15,21 +15,17 @@ def initialize
       @regex_matchers = {}
     end
 
-    def watch(path, &block)
-      return watch_regex(path, &block) if path.is_a?(Regexp)
-      raise "Paths must be regular expressions. #{path.inspect} is a #{path.class}"
-    end
-
     def watch_regex(regex, &block)
       @regex_matchers[regex] = block
     end
+    alias :watch :watch_regex
 
     def trigger(files)
       trigger_files = Hash.new { |h,k| h[k] = Hash.new { |h2,k2| h2[k2] = [] } }
 
       files.each do |file, state|
         @regex_matchers.each do |regex, block|
-          trigger_files[block][state] << file if file =~ regex
+          trigger_files[block][state] << file if regex === file
         end
       end
 

activesupport/test/file_watcher_test.rb

@@ -21,6 +21,16 @@ def setup
     end
   end
 
+  def test_use_triple_equals
+    fw = ActiveSupport::FileWatcher.new
+    called = []
+    fw.watch("some_arbitrary_file.rb") do |file|
+      called << "omg"
+    end
+    fw.trigger(%w{ some_arbitrary_file.rb })
+    assert_equal ['omg'], called
+  end
+
   def test_one_change
     @backend.trigger("app/assets/main.scss" => :changed)
     assert_equal({:changed => ["app/assets/main.scss"]}, @payload.first)