[2.0.1] Implement haphazard error collection for AttrValidator.

- Error collector / Language can take arrays and listify them
- AttrValidator takes token by reference
- Formatted errors now have their severity <strong>
- 100 test-cases! W00t!

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1250 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/Language/messages/en.php

@@ -5,7 +5,14 @@ $fallback = false;
 $messages = array(
 
 'HTMLPurifier' => 'HTML Purifier',
-'LanguageFactoryTest: Pizza' => 'Pizza', // for unit testing purposes
+
+// for unit testing purposes
+'LanguageFactoryTest: Pizza' => 'Pizza',
+'LanguageTest: List' => '$1',
+'LanguageTest: Hash' => '$1.Keys; $1.Values',
+
+'Item separator' => ', ',
+'Item separator last' => ' and ', // non-Harvard style
 
 'ErrorCollector: No errors' => 'No errors detected. However, because error reporting is still incomplete, there may have been errors that the error collector was not notified of; please inspect the output HTML carefully.',
 'ErrorCollector: At line' => ' at line $line',
@@ -37,6 +44,9 @@ $messages = array(
 'Strategy_FixNesting: Node reorganized'      => 'Contents of $CurrentToken.Compact node reorganized to enforce its content model',
 'Strategy_FixNesting: Node contents removed' => 'Contents of $CurrentToken.Compact node removed',
 
+'AttrValidator: Attributes transformed' => 'Attributes on $CurrentToken.Compact transformed from $1.Keys to $2.Keys',
+'AttrValidator: Attribute removed' => '$CurrentAttr.Name attribute on $CurrentToken.Compact removed',
+
 );
 
 $errorNames = array(