improve readme

Remove "tested in PHP 5.2"

.travis.yml

@@ -5,6 +5,4 @@ php:
   - 5.5
   - 5.4
   - 5.3
-  - 5.2
   - hhvm
-  

Parsedown.php

@@ -1197,7 +1197,7 @@ class Parsedown
             return;
         }
 
-        if (preg_match('/^[(]((?:[^ ()]|[(][^ )]+[)])+)(?:[ ]+("[^"]+"|\'[^\']+\'))?[)]/', $remainder, $matches))
+        if (preg_match('/^[(]((?:[^ ()]|[(][^ )]+[)])+)(?:[ ]+("[^"]*"|\'[^\']*\'))?[)]/', $remainder, $matches))
         {
             $Element['attributes']['href'] = $matches[1];
 
@@ -1402,7 +1402,7 @@ class Parsedown
 
             if (isset($Element['handler']))
             {
-                $markup .= $this->$Element['handler']($Element['text']);
+                $markup .= $this->{$Element['handler']}($Element['text']);
             }
             else
             {

README.md

@@ -1,15 +1,18 @@
 ## Parsedown
 
+[![Build Status](https://img.shields.io/travis/erusev/parsedown/master.svg?style=flat-square)](https://travis-ci.org/erusev/parsedown)
+<!--[![Total Downloads](http://img.shields.io/packagist/dt/erusev/parsedown.svg?style=flat-square)](https://packagist.org/packages/erusev/parsedown)-->
+
 Better Markdown Parser in PHP
 
-[[ demo ]](http://parsedown.org/demo)
+[See Demo](http://parsedown.org/demo)
 
 ### Features
 
 * [Fast](http://parsedown.org/speed)
 * [Consistent](http://parsedown.org/consistency)
 * [GitHub flavored](https://help.github.com/articles/github-flavored-markdown)
-* [Tested](http://parsedown.org/tests/) in PHP 5.2, 5.3, 5.4, 5.5, 5.6 and [hhvm](http://www.hhvm.com/)
+* [Tested](http://parsedown.org/tests/) in PHP 5.3, 5.4, 5.5, 5.6 and [HHVM](http://www.hhvm.com/)
 * [Extensible](https://github.com/erusev/parsedown/wiki/Writing-Extensions)
 * [Markdown Extra extension](https://github.com/erusev/parsedown-extra)
 

test/data/image_title.html

@@ -1 +1,2 @@
-<p><img src="/md.png" alt="alt" title="title" /></p>
+<p><img src="/md.png" alt="alt" title="title" /></p>
+<p><img src="/md.png" alt="blank title" title="" /></p>

test/data/image_title.md

@@ -1 +1,3 @@
-![alt](/md.png "title")
+![alt](/md.png "title")
+
+![blank title](/md.png "")

test/data/inline_link_title.html

@@ -1,4 +1,6 @@
 <p><a href="http://example.com" title="Title">single quotes</a></p>
 <p><a href="http://example.com" title="Title">double quotes</a></p>
+<p><a href="http://example.com" title="">single quotes blank</a></p>
+<p><a href="http://example.com" title="">double quotes blank</a></p>
 <p><a href="http://example.com" title="2 Words">space</a></p>
 <p><a href="http://example.com/url-(parentheses)" title="Title">parentheses</a></p>

test/data/inline_link_title.md

@@ -2,6 +2,10 @@
 
 [double quotes](http://example.com "Title")
 
+[single quotes blank](http://example.com '')
+
+[double quotes blank](http://example.com "")
+
 [space](http://example.com "2 Words")
 
 [parentheses](http://example.com/url-(parentheses) "Title")