Rename hashtags enabled to strict mode

We can use this to seperate any intentional spec deviations from
spec behaviour so users can pick between compatability and spec
implementations

Parsedown.php

@@ -90,14 +90,14 @@ class Parsedown
 
     protected $safeMode;
 
-    function setHastagsEnabled($hashtagsEnabled)
+    function setStrictMode($strictMode)
     {
-        $this->hashtagsEnabled = (bool) $hashtagsEnabled;
+        $this->strictMode = (bool) $strictMode;
 
         return $this;
     }
 
-    protected $hashtagsEnabled;
+    protected $strictMode;
 
     protected $safeLinksWhitelist = array(
         'http://',
@@ -529,7 +529,8 @@ class Parsedown
 
             $text = trim($Line['text'], '#');
 
-            if ($this->hashtagsEnabled and (!isset($text[0]) or $text[0] !== ' ')) {
+            if ($this->strictMode and ( ! isset($text[0]) or $text[0] !== ' '))
+            {
                 return;
             }
 

test/ParsedownTest.php

@@ -32,7 +32,6 @@ class ParsedownTest extends TestCase
     protected function initParsedown()
     {
         $Parsedown = new TestParsedown();
-        $Parsedown->setHastagsEnabled(true);
 
         return $Parsedown;
     }
@@ -52,6 +51,7 @@ class ParsedownTest extends TestCase
         $expectedMarkup = str_replace("\r", "\n", $expectedMarkup);
 
         $this->Parsedown->setSafeMode(substr($test, 0, 3) === 'xss');
+        $this->Parsedown->setStrictMode(substr($test, 0, 6) === 'strict');
 
         $actualMarkup = $this->Parsedown->text($markdown);
 

test/data/atx_heading.html

@@ -7,7 +7,6 @@
 <p>####### not a heading</p>
 <h1>closed h1</h1>
 <p>#</p>
-<p>##</p>
 <h1># of levels</h1>
 <h1># of levels #</h1>
-<p>#hashtag</p>
+<h1>heading</h1>

test/data/atx_heading.md

@@ -16,10 +16,8 @@
 
 #
 
-##
-
 # # of levels
 
 # # of levels # #
 
-#hashtag
+#heading

test/data/strict_atx_heading.html

@@ -0,0 +1,13 @@
+<h1>h1</h1>
+<h2>h2</h2>
+<h3>h3</h3>
+<h4>h4</h4>
+<h5>h5</h5>
+<h6>h6</h6>
+<p>####### not a heading</p>
+<p>#not a heading</p>
+<h1>closed h1</h1>
+<h1></h1>
+<h2></h2>
+<h1># of levels</h1>
+<h1># of levels #</h1>

test/data/strict_atx_heading.md

@@ -0,0 +1,25 @@
+# h1
+
+## h2
+
+### h3
+
+#### h4
+
+##### h5
+
+###### h6
+
+####### not a heading
+
+#not a heading
+
+# closed h1 #
+
+#
+
+##
+
+# # of levels
+
+# # of levels # #