Soften these specs to just expected frames

These don't need to test that the text is exactly the same. It is
sufficient to confirm that the two frames are for "foo" and the
block.

Author: headius

language/ensure_spec.rb

@@ -339,10 +339,8 @@ def foo
         end
       end
       line = __LINE__
-      foo.should == [
-        "#{__FILE__}:#{line-3}:in 'foo'",
-        "#{__FILE__}:#{line+1}:in 'block (3 levels) in <top (required)>'"
-      ]
+      foo[0].should =~ /#{__FILE__}:#{line-3}:in 'foo'/
+      foo[1].should =~ /#{__FILE__}:#{line+2}:in 'block/
     end
   end
 end

language/rescue_spec.rb

@@ -573,10 +573,8 @@ def foo
         end
       end
       line = __LINE__
-      foo.should == [
-        "#{__FILE__}:#{line-3}:in 'foo'",
-        "#{__FILE__}:#{line+1}:in 'block (3 levels) in <top (required)>'"
-      ]
+      foo[0].should =~ /#{__FILE__}:#{line-3}:in 'foo'/
+      foo[1].should =~ /#{__FILE__}:#{line+2}:in 'block/
     end
   end