Update rustdoc test for ## handling

Author: GuillaumeGomez

tests/rustdoc/issue-41783.codeblock.html

@@ -1,5 +1,5 @@
-<code># single
-## double
-### triple
-<span class="attr">#[outer]
-#![inner]</span></code>
+<code>## single
+### double
+#### triple
+#<span class="attr">#[outer]
+</span>#<span class="attr">#![inner]</span></code>

tests/rustdoc/issue-41783.rs

@@ -4,7 +4,7 @@
 // @hasraw - '<span class="attr">#[outer]'
 // @!hasraw - '<span class="attr">#[outer]</span>'
 // @hasraw - '#![inner]</span>'
-// @!hasraw - '<span class="attr">#![inner]</span>'
+// @hasraw - '#<span class="attr">#![inner]</span>'
 // @snapshot 'codeblock' - '//*[@class="toggle top-doc"]/*[@class="docblock"]//pre/code'
 
 /// ```no_run