mruby-dir/dir.rb: reformat according to coding standard

mrbgems/mruby-dir/mrblib/dir.rb

@@ -9,53 +9,53 @@ class Dir
   alias pos tell
   alias pos= seek
 
-  def self.entries(path)
-    a = []
-      self.open(path) { |d|
-      while s = d.read
-        a << s
-      end
-    }
-    a
-  end
-
-  def self.foreach(path, &block)
-    if block
-      self.open(path).each { |f| block.call(f) }
-    else
-      self.open(path).each
-    end
-  end
-
-  def self.open(path, &block)
-    if block
-      d = self.new(path)
-      begin
-        block.call(d)
-      ensure
-        d.close
-      end
-    else
-      self.new(path)
-    end
-  end
-
-  def self.chdir(path, &block)
-    my = self # workaround for https://github.com/mruby/mruby/issues/1579
-    if block
-      wd = self.getwd
-      begin
-        self._chdir(path)
-        block.call(path)
-      ensure
-        my._chdir(wd)
-      end
-    else
-      self._chdir(path)
-    end
-  end
-
   class << self
+    def entries(path)
+      a = []
+      self.open(path) do |d|
+        while s = d.read
+          a << s
+        end
+      end
+      a
+    end
+
+    def foreach(path, &block)
+      if block
+        self.open(path).each {|f| block.call(f) }
+      else
+        self.open(path).each
+      end
+    end
+
+    def open(path, &block)
+      if block
+        d = self.new(path)
+        begin
+          block.call(d)
+        ensure
+          d.close
+        end
+      else
+        self.new(path)
+      end
+    end
+
+    def chdir(path, &block)
+      my = self # workaround for https://github.com/mruby/mruby/issues/1579
+      if block
+        wd = self.getwd
+        begin
+          self._chdir(path)
+          block.call(path)
+        ensure
+          my._chdir(wd)
+        end
+      else
+        self._chdir(path)
+      end
+    end
+
     alias exists? exist?
     alias pwd getwd
     alias rmdir delete