fix handling of shorthand email links - closes #41

also add test case for it

lib/converters.coffee

@@ -97,8 +97,9 @@ module.exports = [
           "[#{content}]"
         else
           "[#{content}][#{referenceLink.name}]"
-      else if not title and url isnt '' and content is url
-        "<#{url}>"
+      else if not title and url isnt '' and
+              (content is url or content is url.replace(/^mailto:/, ''))
+        "<#{content}>"
       else if title
         "[#{content}](#{url} \"#{title}\")"
       else

test/index.coffee

@@ -513,6 +513,13 @@ describe 'inline grammar', ->
       '<https://github.com/slang800/tidy-markdown>'
     )
 
+  it 'should handle shorthand email links', ->
+    tidyMdSnippet(
+      '<[email protected]>'
+    ).should.equal(
+      '<[email protected]>'
+    )
+
   it 'should handle reference links', ->
     tidyMdSnippet('''
       [NPM version][npm-url]