Fix bug#17050

* lisp/progmodes/ruby-mode.el (ruby-smie-rules):
Add indentation rule for ` @ '.

lisp/ChangeLog

@@ -1,3 +1,8 @@
+2014-03-21  Dmitry Gutov  <dgutov@yandex.ru>
+
+	* progmodes/ruby-mode.el (ruby-smie-rules):
+	Add indentation rule for ` @ '.  (Bug#17050)
+
 2014-03-21  Juanma Barranquero  <lekktu@gmail.com>
 
 	* align.el (align-regexp): Remove superfluous backslash.

lisp/progmodes/ruby-mode.el

@@ -650,6 +650,10 @@ It is used when `ruby-encoding-magic-comment-style' is set to `custom'."
        ;; because we want to reject hanging tokens at bol, too.
        (unless (or (eolp) (forward-comment 1))
          (cons 'column (current-column)))))
+    (`(:before . " @ ")
+     (save-excursion
+       (skip-chars-forward " \t")
+       (cons 'column (current-column))))
     (`(:before . "do") (ruby-smie--indent-to-stmt))
     (`(:before . ".")
      (if (smie-rule-sibling-p)

test/indent/ruby.rb

@@ -379,3 +379,20 @@ def qux
    'd' => %w(e f)
  }
 }
+
+# Bug#17050
+
+return render json: {
+                errors: { base: [message] },
+                copying: copying
+              },
+              status: 400
+
+top test(
+      some,
+      top,
+      test)
+
+foo bar, {
+      tee: qux
+    }