Add support for the display of monotone node attributes.

(also fix the way the attributes view is displayed, i.e. do not
 use single strings, but one string in context which is much easier
 to translate)

test/IDF/Scm/MonotoneTest.php

@@ -714,6 +714,31 @@ END;
         $this->assertEquals('', $commit->diff);
     }
 
+    public function testGetProperties()
+    {
+        $rev = "2345678901234567890123456789012345678901";
+
+        $instance = $this->createMock();
+        $instance->getStdio()->setExpectedOutput(array('interface_version'), array(), '13.1');
+
+        $stdio =<<<END
+attr "foo" "bar"
+state "unchanged"
+
+attr "some new
+line" "and more <weird>-
+nesses"
+END;
+        $instance->getStdio()->setExpectedOutput(array('get_attributes', 'foo'), array('r' => $rev), $stdio);
+        $res = $instance->getProperties($rev, 'foo');
+
+        $this->assertEquals(2, count($res));
+        $this->assertEquals(array(
+          'foo' => 'bar',
+          "some new\nline" => "and more <weird>-\nnesses"
+        ), $res);
+    }
+
     public function testGetExtraProperties()
     {
         $instance = $this->createMock();