Render element attributes in the order they were defined `attributes` uses a LinkedHashMap, so the ordering is stable with the input

diff --git a/pkgs/markdown/CHANGELOG.md b/pkgs/markdown/CHANGELOG.md
index 7a6fe79..d4ace80 100644
--- a/pkgs/markdown/CHANGELOG.md
+++ b/pkgs/markdown/CHANGELOG.md

@@ -1,5 +1,7 @@
 ## 2.0.3
 
+* Render element attributes in the order they were defined.
+  Aligns more closely with the strict spec definition.
 * Added 68 new GitHub emojis.
 
 ## 2.0.2

diff --git a/pkgs/markdown/lib/src/html_renderer.dart b/pkgs/markdown/lib/src/html_renderer.dart
index 95e0cda..d77c6f2 100644
--- a/pkgs/markdown/lib/src/html_renderer.dart
+++ b/pkgs/markdown/lib/src/html_renderer.dart

@@ -66,12 +66,8 @@
 
     buffer.write('<${element.tag}');
 
-    // Sort the keys so that we generate stable output.
-    var attributeNames = element.attributes.keys.toList();
-    attributeNames.sort((a, b) => a.compareTo(b));
-
-    for (var name in attributeNames) {
-      buffer.write(' $name="${element.attributes[name]}"');
+    for (var entry in element.attributes.entries) {
+      buffer.write(' ${entry.key}="${entry.value}"');
     }
 
     // attach header anchor ids generated from text

diff --git a/pkgs/markdown/test/original/inline_images.unit b/pkgs/markdown/test/original/inline_images.unit
index 9ce0674..5e38830 100644
--- a/pkgs/markdown/test/original/inline_images.unit
+++ b/pkgs/markdown/test/original/inline_images.unit

@@ -2,19 +2,19 @@
 ![](http://foo.com/foo.png)
 
 <<<
-<p><img alt="" src="http://foo.com/foo.png" /></p>
+<p><img src="http://foo.com/foo.png" alt="" /></p>
 >>> alternate text
 ![alternate text](http://foo.com/foo.png)
 
 <<<
-<p><img alt="alternate text" src="http://foo.com/foo.png" /></p>
+<p><img src="http://foo.com/foo.png" alt="alternate text" /></p>
 >>> title
 ![](http://foo.com/foo.png "optional title")
 
 <<<
-<p><img alt="" src="http://foo.com/foo.png" title="optional title" /></p>
+<p><img src="http://foo.com/foo.png" alt="" title="optional title" /></p>
 >>> invalid alt text
 ![`alt`](http://foo.com/foo.png)
 
 <<<
-<p><img alt="alt" src="http://foo.com/foo.png" /></p>
+<p><img src="http://foo.com/foo.png" alt="alt" /></p>

diff --git a/pkgs/markdown/test/original/inline_links.unit b/pkgs/markdown/test/original/inline_links.unit
index 74afe5a..4bfd85a 100644
--- a/pkgs/markdown/test/original/inline_links.unit
+++ b/pkgs/markdown/test/original/inline_links.unit

@@ -17,17 +17,17 @@
 links [![](/are.png)](http://foo.com) awesome
 
 <<<
-<p>links <a href="http://foo.com"><img alt="" src="/are.png" /></a> awesome</p>
+<p>links <a href="http://foo.com"><img src="/are.png" alt="" /></a> awesome</p>
 >>> image with alt inside link
 links [![my alt](/are.png)](http://foo.com) awesome
 
 <<<
-<p>links <a href="http://foo.com"><img alt="my alt" src="/are.png" /></a> awesome</p>
+<p>links <a href="http://foo.com"><img src="/are.png" alt="my alt" /></a> awesome</p>
 >>> image with title inside link
 links [![](/are.png "my title")](http://foo.com) awesome
 
 <<<
-<p>links <a href="http://foo.com"><img alt="" src="/are.png" title="my title" /></a> awesome</p>
+<p>links <a href="http://foo.com"><img src="/are.png" alt="" title="my title" /></a> awesome</p>
 >>> no URL
 links [are]() awesome
 

diff --git a/pkgs/markdown/test/original/reference_images.unit b/pkgs/markdown/test/original/reference_images.unit
index 2444a11..b098d24 100644
--- a/pkgs/markdown/test/original/reference_images.unit
+++ b/pkgs/markdown/test/original/reference_images.unit

@@ -4,31 +4,31 @@
 [foo]: http://foo.com/foo.png
 
 <<<
-<p><img alt="" src="http://foo.com/foo.png" /></p>
+<p><img src="http://foo.com/foo.png" alt="" /></p>
 >>> alternate text
 ![alternate text][foo]
 
 [foo]: http://foo.com/foo.png
 
 <<<
-<p><img alt="alternate text" src="http://foo.com/foo.png" /></p>
+<p><img src="http://foo.com/foo.png" alt="alternate text" /></p>
 >>> title
 ![][foo]
 
 [foo]: http://foo.com/foo.png "optional title"
 
 <<<
-<p><img alt="" src="http://foo.com/foo.png" title="optional title" /></p>
+<p><img src="http://foo.com/foo.png" alt="" title="optional title" /></p>
 >>> invalid alt text
 ![`alt`][foo]
 
 [foo]: http://foo.com/foo.png "optional title"
 
 <<<
-<p><img alt="alt" src="http://foo.com/foo.png" title="optional title" /></p>
+<p><img src="http://foo.com/foo.png" alt="alt" title="optional title" /></p>
 >>> shortcut reference image
 ![foo]
 
 [foo]: http://foo.com/foo.png
 <<<
-<p><img alt="foo" src="http://foo.com/foo.png" /></p>
+<p><img src="http://foo.com/foo.png" alt="foo" /></p>

diff --git a/pkgs/markdown/test/original/reference_links.unit b/pkgs/markdown/test/original/reference_links.unit
index 6b22081..6c217a5 100644
--- a/pkgs/markdown/test/original/reference_links.unit
+++ b/pkgs/markdown/test/original/reference_links.unit

@@ -88,4 +88,4 @@
 [coverage_page]:https://coveralls.io/github/yeradis/stay_points.dart?branch=master
 [coverage_status]: https://coveralls.io/repos/github/yeradis/stay_points.dart/badge.svg?branch=master
 <<<
-<p><a href="https://coveralls.io/github/yeradis/stay_points.dart?branch=master"><img alt="Coverage Status" src="https://coveralls.io/repos/github/yeradis/stay_points.dart/badge.svg?branch=master" /></a></p>
\ No newline at end of file
+<p><a href="https://coveralls.io/github/yeradis/stay_points.dart?branch=master"><img src="https://coveralls.io/repos/github/yeradis/stay_points.dart/badge.svg?branch=master" alt="Coverage Status" /></a></p>
\ No newline at end of file

diff --git a/pkgs/markdown/tool/common_mark_stats.json b/pkgs/markdown/tool/common_mark_stats.json
index 505167a..5949d7b 100644
--- a/pkgs/markdown/tool/common_mark_stats.json
+++ b/pkgs/markdown/tool/common_mark_stats.json

@@ -341,26 +341,26 @@
   "158": "loose"
  },
  "Images": {
-  "543": "loose",
+  "543": "strict",
   "544": "loose",
   "545": "fail",
-  "546": "loose",
+  "546": "strict",
   "547": "loose",
   "548": "loose",
-  "549": "loose",
-  "550": "loose",
-  "551": "loose",
-  "552": "loose",
-  "553": "loose",
-  "554": "loose",
-  "555": "loose",
-  "556": "loose",
-  "557": "loose",
+  "549": "strict",
+  "550": "strict",
+  "551": "strict",
+  "552": "strict",
+  "553": "strict",
+  "554": "strict",
+  "555": "strict",
+  "556": "strict",
+  "557": "strict",
   "558": "loose",
-  "559": "loose",
-  "560": "loose",
+  "559": "strict",
+  "560": "strict",
   "561": "loose",
-  "562": "loose",
+  "562": "strict",
   "563": "strict",
   "564": "strict"
  },
@@ -436,10 +436,10 @@
   "485": "strict",
   "486": "strict",
   "487": "strict",
-  "488": "loose",
+  "488": "strict",
   "489": "strict",
   "490": "strict",
-  "491": "loose",
+  "491": "strict",
   "492": "fail",
   "493": "strict",
   "494": "strict",
@@ -450,7 +450,7 @@
   "499": "strict",
   "500": "strict",
   "501": "strict",
-  "502": "loose",
+  "502": "strict",
   "503": "strict",
   "504": "strict",
   "505": "fail",

diff --git a/pkgs/markdown/tool/gfm_stats.json b/pkgs/markdown/tool/gfm_stats.json
index 7151ef7..aae6a73 100644
--- a/pkgs/markdown/tool/gfm_stats.json
+++ b/pkgs/markdown/tool/gfm_stats.json

@@ -362,26 +362,26 @@
   "158": "loose"
  },
  "Images": {
-  "563": "loose",
+  "563": "strict",
   "564": "loose",
   "565": "fail",
-  "566": "loose",
+  "566": "strict",
   "567": "loose",
   "568": "loose",
-  "569": "loose",
-  "570": "loose",
-  "571": "loose",
-  "572": "loose",
-  "573": "loose",
-  "574": "loose",
-  "575": "loose",
-  "576": "loose",
-  "577": "loose",
+  "569": "strict",
+  "570": "strict",
+  "571": "strict",
+  "572": "strict",
+  "573": "strict",
+  "574": "strict",
+  "575": "strict",
+  "576": "strict",
+  "577": "strict",
   "578": "loose",
-  "579": "loose",
-  "580": "loose",
+  "579": "strict",
+  "580": "strict",
   "581": "loose",
-  "582": "loose",
+  "582": "strict",
   "583": "strict",
   "584": "strict"
  },
@@ -458,10 +458,10 @@
   "505": "strict",
   "506": "strict",
   "507": "strict",
-  "508": "loose",
+  "508": "strict",
   "509": "strict",
   "510": "strict",
-  "511": "loose",
+  "511": "strict",
   "512": "fail",
   "513": "strict",
   "514": "strict",
@@ -472,7 +472,7 @@
   "519": "strict",
   "520": "strict",
   "521": "strict",
-  "522": "loose",
+  "522": "strict",
   "523": "strict",
   "524": "strict",
   "525": "fail",