Fixed bug in acronym showing the header, added a test.

plugins/Http.py

@@ -265,7 +265,8 @@ class Http(callbacks.Privmsg):
         quote = ' // '.join(quote.splitlines())
         irc.reply(msg, quote)
 
-    _acronymre = re.compile(r'width="7\d%" bgcolor="[^"]+">(?:<b>)?([^<]+)')
+    _acronymre = re.compile(r'valign="middle" width="7\d%" bgcolor="[^"]+">'
+                            r'(?:<b>)?([^<]+)')
     def acronym(self, irc, msg, args):
         """<acronym>
 

test/test_Http.py

@@ -67,7 +67,7 @@ class HttpTest(PluginTestCase, PluginDocumentation):
 
     def testAcronym(self):
         self.assertRegexp('acronym ASAP', 'as soon as possible')
-        self.assertNotError('acronym PERL')
+        self.assertNotRegexp('acronym asap', 'Definition')
         self.assertNotRegexp('acronym UNIX', 'not an acronym')
 
     def testNetcraft(self):