MDL-47002 editor_atto: Remove all after html when pasting

lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor-debug.js

@@ -828,6 +828,8 @@ EditorClean.prototype = {
         // Rules that get rid of the real-nasties and don't care about normalize code (correct quotes, white spaces, etc).
         var rules = [
             // Stuff that is specifically from MS Word and similar office packages.
+            // Remove all garbage after closing html tag.
+            {regex: /<\s*\/html\s*>([\s\S]+)$/gi, replace: ""},
             // Remove if comment blocks.
             {regex: /<!--\[if[\s\S]*?endif\]-->/gi, replace: ""},
             // Remove start and end fragment comment blocks.

lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor.js

@@ -824,6 +824,8 @@ EditorClean.prototype = {
         // Rules that get rid of the real-nasties and don't care about normalize code (correct quotes, white spaces, etc).
         var rules = [
             // Stuff that is specifically from MS Word and similar office packages.
+            // Remove all garbage after closing html tag.
+            {regex: /<\s*\/html\s*>([\s\S]+)$/gi, replace: ""},
             // Remove if comment blocks.
             {regex: /<!--\[if[\s\S]*?endif\]-->/gi, replace: ""},
             // Remove start and end fragment comment blocks.

lib/editor/atto/yui/src/editor/js/clean.js

@@ -263,6 +263,8 @@ EditorClean.prototype = {
         // Rules that get rid of the real-nasties and don't care about normalize code (correct quotes, white spaces, etc).
         var rules = [
             // Stuff that is specifically from MS Word and similar office packages.
+            // Remove all garbage after closing html tag.
+            {regex: /<\s*\/html\s*>([\s\S]+)$/gi, replace: ""},
             // Remove if comment blocks.
             {regex: /<!--\[if[\s\S]*?endif\]-->/gi, replace: ""},
             // Remove start and end fragment comment blocks.