Drop lowercasing of PI attribute names

Author: foolip

dom.bs

@@ -8636,8 +8636,6 @@ method steps are:
  <li><p>If <var>name</var> is not a <a>valid attribute local name</a>, then <a>throw</a> an
  "{{InvalidCharacterError!!exception}}" {{DOMException}}.
 
- <li><p>Set <var>name</var> to <var>name</var> in <a>ASCII lowercase</a>.
-
  <li><p><a for=map>Set</a> <a>this</a>'s
  <a for=ProcessingInstruction>attribute map</a>[<var>name</var>] to <var>value</var>.
 
@@ -8650,8 +8648,6 @@ method steps are:
 method steps are:
 
 <ol>
- <li><p>Set <var>name</var> to <var>name</var> in <a>ASCII lowercase</a>.
-
  <li><p><a for=map>Remove</a> <a>this</a>'s
  <a for=ProcessingInstruction>attribute map</a>[<var>name</var>].
 
@@ -8668,8 +8664,6 @@ method steps are:
  <li><p>If <var>name</var> is not a <a>valid attribute local name</a>, then <a>throw</a> an
  "{{InvalidCharacterError!!exception}}" {{DOMException}}.
 
- <li><p>Set <var>name</var> to <var>name</var> in <a>ASCII lowercase</a>.
-
  <li><p>Let <var>attributes</var> be <a>this</a>'s <a for=ProcessingInstruction>attribute map</a>.
 
  <li>
@@ -8693,14 +8687,9 @@ method steps are:
 
 <div algorithm>
 <p>The <dfn method for=ProcessingInstruction><code>hasAttribute(<var>name</var>)</code></dfn>
-method steps are:
-
-<ol>
- <li><p>Set <var>name</var> to <var>name</var> in <a>ASCII lowercase</a>.
-
- <li><p>Return true if <a>this</a>'s <a for=ProcessingInstruction>attribute map</a>[<var>name</var>]
- <a for=set>exists</a>; otherwise false.
-</ol>
+method steps are to return true if <a>this</a>'s
+<a for=ProcessingInstruction>attribute map</a>[<var>name</var>] <a for=set>exists</a>; otherwise
+false.
 </div>
 
 <div algorithm>
@@ -8782,15 +8771,9 @@ method steps are:
 
 <div algorithm>
 <p>To <dfn export id=concept-pi-get-attribute>get a processing instruction attribute</dfn>, given a
-{{ProcessingInstruction}} <a for=/>node</a> <var>pi</var> and a string <var>name</var>:
-
-<ol>
- <li><p>Let <var>lowercaseName</var> be <var>name</var> in <a>ASCII lowercase</a>.
-
- <li><p>Return <var>pi</var>'s
- <a for=ProcessingInstruction>attribute map</a>[<var>lowercaseName</var>]
- <a for=map>with default</a> null.
-</ol>
+{{ProcessingInstruction}} <a for=/>node</a> <var>pi</var> and a string <var>name</var>, return
+<var>pi</var>'s <a for=ProcessingInstruction>attribute map</a>[<var>name</var>]
+<a for=map>with default</a> null.
 </div>