Update README, comments

Author: stefanruijsenaars

README.markdown

@@ -4,12 +4,12 @@
 
 HTML_CodeSniffer is a JavaScript application that checks a HTML document
 or source code, and detects violations of a defined presentation or accessibility
-standard, such as Section508 or WCAG2.0.
+standard, such as Section508 or WCAG2.1.
 
 ## Standards included
 
 By default, HTML_CodeSniffer comes with standards that cover the three conformance
-levels of the <abbr title="World Wide Web Consortium">W3C</abbr> [Web Content Accessibility Guidelines (WCAG) 2.0](http://www.w3.org/TR/WCAG20),
+levels of the <abbr title="World Wide Web Consortium">W3C</abbr> [Web Content Accessibility Guidelines (WCAG) 2.1](https://www.w3.org/TR/WCAG21/),
 and the <abbr title="United States of America">U.S.</abbr> [Section 508](http://section508.gov/index.cfm?fuseAction=stdsdoc) legislation.
 It also provides tools to write your own standards, which can be useful in situations
 where you wish to enforce consistency across a web site.

Standards/Section508/Sniffs/A.js

@@ -48,7 +48,7 @@ _global.HTMLCS_Section508_Sniffs_A = {
             if ((nodeName === 'object') || (nodeName === 'bgsound') || (nodeName === 'audio')) {
                 // Audio transcript notice. Yes, this is in A rather than B, since
                 // audio is not considered "multimedia" (roughly equivalent to a
-                // "synchronised media" presentation in WCAG 2.0). It is non-text,
+                // "synchronised media" presentation in WCAG 2.1). It is non-text,
                 // though, so a transcript is required.
                 HTMLCS.addMessage(HTMLCS.NOTICE, element, 'For multimedia containing audio only, ensure an alternative is available, such as a full text transcript.', 'Audio');
             }
@@ -177,7 +177,7 @@ _global.HTMLCS_Section508_Sniffs_A = {
      * Driver function for the null alt text tests.
      *
      * This takes the generic result given by the alt text testing functions
-     * (located in WCAG 2.0 SC 1.1.1), and converts them into Section 508-specific
+     * (located in WCAG 2.1 SC 1.1.1), and converts them into Section 508-specific
      * messages.
      *
      * @param {DOMNode} element The element to test.
@@ -293,7 +293,7 @@ _global.HTMLCS_Section508_Sniffs_A = {
      * Driver function for the media alternative (object/applet) tests.
      *
      * This takes the generic result given by the media alternative testing function
-     * (located in WCAG 2.0 SC 1.1.1), and converts them into Section
+     * (located in WCAG 2.1 SC 1.1.1), and converts them into Section
      * 508-specific messages.
      *
      * @param {DOMNode} element The element to test.

Standards/WCAG2AAA/Sniffs/Principle1/Guideline1_1/1_1_1.js

@@ -56,7 +56,7 @@ _global.HTMLCS_WCAG2AAA_Sniffs_Principle1_Guideline1_1_1_1_1 = {
      * Driver function for the null alt text tests.
      *
      * This takes the generic result given by the alt text testing functions,
-     * and converts them into WCAG 2.0-specific messages.
+     * and converts them into WCAG 2.1-specific messages.
      *
      * @param {DOMNode} element The element to test.
      */
@@ -337,7 +337,7 @@ _global.HTMLCS_WCAG2AAA_Sniffs_Principle1_Guideline1_1_1_1_1 = {
      * Driver function for the media alternative (object/applet) tests.
      *
      * This takes the generic result given by the media alternative testing function,
-     * and converts them into WCAG 2.0-specific messages.
+     * and converts them into WCAG 2.1-specific messages.
      *
      * @param {DOMNode} element The element to test.
      */