From f361d36966631476ab4c7d51d75f3a0e379979d0 Mon Sep 17 00:00:00 2001
From: egavr <job.egavr@yandex.ru>
Date: Wed, 16 Mar 2016 18:20:56 +0300
Subject: [PATCH 1/3] Add ignoring of duplicate 'css' classes

---
 lib/utils/utils.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/utils/utils.js b/lib/utils/utils.js
index aa69f41..72f1bc8 100644
--- a/lib/utils/utils.js
+++ b/lib/utils/utils.js
@@ -51,7 +51,11 @@ function sortCssClasses(attrs) {
     function _sortCssClassesValues(cssClasses) {
         var classList = (cssClasses || '').split(' ');
 
-        return _.filter(classList).sort().join(' ');
+        return _(classList)
+            .filter()
+            .uniq()
+            .sort()
+            .join(' ');
     }
 
     var classIndexes = _getIndexesInArray(attrs, 'class');

From f92a6818adcc8e2fbd0813081eeb545d5083d505 Mon Sep 17 00:00:00 2001
From: egavr <job.egavr@yandex.ru>
Date: Wed, 16 Mar 2016 18:21:21 +0300
Subject: [PATCH 2/3] Add test cases on ignoring of duplicate 'css' classes

---
 test/differ/fixtures/second/sort-classes.html | 2 +-
 test/unit/utils.js                            | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/test/differ/fixtures/second/sort-classes.html b/test/differ/fixtures/second/sort-classes.html
index 525f24a..dc06c25 100644
--- a/test/differ/fixtures/second/sort-classes.html
+++ b/test/differ/fixtures/second/sort-classes.html
@@ -1 +1 @@
-<input class=" cd  ab bc">
+<input class=" cd  ab bc bc">
diff --git a/test/unit/utils.js b/test/unit/utils.js
index 97970a6..b5837eb 100644
--- a/test/unit/utils.js
+++ b/test/unit/utils.js
@@ -29,11 +29,13 @@ describe('\'utils\'', function () {
                 { name: 'class', value: ' b c a' },
                 { name: 'blah', value: 'b c a' },
                 { name: 'class', value: '' },
+                { name: 'class', value: 'a a a' }
             ],
             output = [
                 { name: 'class', value: 'a b c' },
                 { name: 'blah', value: 'b c a' },
-                { name: 'class', value: '' }
+                { name: 'class', value: '' },
+                { name: 'class', value: 'a' }
             ];
 
         utils.sortCssClasses(input).must.be.eql(output);

From 88dc25507a92552d815410b39d1b2c31baa0294c Mon Sep 17 00:00:00 2001
From: egavr <job.egavr@yandex.ru>
Date: Wed, 16 Mar 2016 18:21:31 +0300
Subject: [PATCH 3/3] Add to README the info about the ignoring of duplicate
 'css' classes

---
 README.md    | 2 +-
 README.ru.md | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index cd2f33a..4b1c4d4 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ For example, the following two code samples will be considered to be equivalent:
 ```
 
 ```html
-<span class=" cd  ab bc">Text</span>
+<span class=" cd  ab bc bc">Text</span>
 ```
 
 **CAUTION!**<br>
diff --git a/README.ru.md b/README.ru.md
index af9c6a0..adac42f 100644
--- a/README.ru.md
+++ b/README.ru.md
@@ -81,7 +81,7 @@
 ```
 
 ```html
-<span class=" cd  ab bc">Text</span>
+<span class=" cd  ab bc bc">Text</span>
 ```
 
 **ВНИМАНИЕ!**<br>