[c] (0) Make <a href='?guitar=2&amp=1&pedal=6'> a parse error since I…

…E9 misparses it '?guitar=2&=1&pedal=6' apparently. Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=19102 Affected topics: HTML Syntax and Parsing git-svn-id: http://svn.whatwg.org/webapps@7679 340c8d12-0b0e-0410-8428-c7bf67bfef74
whatwg · Jan 31, 2013 · 1eb194f · 1eb194f
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diff --git a/complete.html b/complete.html
@@ -90137,9 +90137,14 @@ <h5 id=tokenizing-character-references><span class=secno>12.2.4.69 </span>Tokeni
     SEMICOLON character (;), and the next character is either a U+003D EQUALS SIGN character (=) or
     an <a href=#alphanumeric-ascii-characters title="alphanumeric ASCII characters">alphanumeric ASCII character</a>, then, for
     historical reasons, all the characters that were matched after the U+0026 AMPERSAND character
-    (&amp;) must be unconsumed, and nothing is returned.</p> <!-- "=" added because of
+    (&amp;) must be unconsumed, and nothing is returned. <!-- "=" added because of
     http://www.w3.org/Bugs/Public/show_bug.cgi?id=9207#c5 -->
 
+    However, if this next character is in fact a U+003D EQUALS SIGN character (=), then this is a
+    <a href=#parse-error>parse error</a>, because some legacy user agents <!-- IE, version 9 and before --> will
+    misinterpret the markup in those cases.</p> <!-- v2: should make this no longer a conformance
+    error at some point in the future; revisit in 2015? -->
+
     <p>Otherwise, a character reference is parsed. If the last
     character matched is not a U+003B SEMICOLON character (;), there
     is a <a href=#parse-error>parse error</a>.</p>

diff --git a/index b/index
@@ -90137,9 +90137,14 @@ dictionary <dfn id=storageeventinit>StorageEventInit</dfn> : <a href=#eventinit>
     SEMICOLON character (;), and the next character is either a U+003D EQUALS SIGN character (=) or
     an <a href=#alphanumeric-ascii-characters title="alphanumeric ASCII characters">alphanumeric ASCII character</a>, then, for
     historical reasons, all the characters that were matched after the U+0026 AMPERSAND character
-    (&amp;) must be unconsumed, and nothing is returned.</p> <!-- "=" added because of
+    (&amp;) must be unconsumed, and nothing is returned. <!-- "=" added because of
     http://www.w3.org/Bugs/Public/show_bug.cgi?id=9207#c5 -->
 
+    However, if this next character is in fact a U+003D EQUALS SIGN character (=), then this is a
+    <a href=#parse-error>parse error</a>, because some legacy user agents <!-- IE, version 9 and before --> will
+    misinterpret the markup in those cases.</p> <!-- v2: should make this no longer a conformance
+    error at some point in the future; revisit in 2015? -->
+
     <p>Otherwise, a character reference is parsed. If the last
     character matched is not a U+003B SEMICOLON character (;), there
     is a <a href=#parse-error>parse error</a>.</p>

diff --git a/source b/source
@@ -104601,9 +104601,14 @@ dictionary <dfn>StorageEventInit</dfn> : <span>EventInit</span> {
     SEMICOLON character (;), and the next character is either a U+003D EQUALS SIGN character (=) or
     an <span title="alphanumeric ASCII characters">alphanumeric ASCII character</span>, then, for
     historical reasons, all the characters that were matched after the U+0026 AMPERSAND character
-    (&amp;) must be unconsumed, and nothing is returned.</p> <!-- "=" added because of
+    (&amp;) must be unconsumed, and nothing is returned. <!-- "=" added because of
     http://www.w3.org/Bugs/Public/show_bug.cgi?id=9207#c5 -->
 
+    However, if this next character is in fact a U+003D EQUALS SIGN character (=), then this is a
+    <span>parse error</span>, because some legacy user agents <!-- IE, version 9 and before --> will
+    misinterpret the markup in those cases.</p> <!-- v2: should make this no longer a conformance
+    error at some point in the future; revisit in 2015? -->
+
     <p>Otherwise, a character reference is parsed. If the last
     character matched is not a U+003B SEMICOLON character (;), there
     is a <span>parse error</span>.</p>