[doc] Fix HTML found by the HTM8 validator

It might be called DML8 or HX8 too

Check the new site.  The blog has some errors too.

data_lang/htm8-test.sh

@@ -66,13 +66,21 @@ EOF
 
 # Takes ~13 seconds
 test-site() {
+  local new_site=${1:-}
+
   # TODO: 
   # - test that the top level lexes
   #   - test that each tag lexers
   #     - test that each quoted attribute lexes
   # - test that tags are balanced
 
-  pushd ../../oilshell/oilshell.org__deploy 
+  if test -n "$new_site"; then
+    dir='../oils.pub__deploy'
+  else
+    dir='../../oilshell/oilshell.org__deploy'
+  fi
+
+  pushd $dir
 
   # Too many files
   # site-files | xargs wc -l | grep total

doc/j8-notation.md

@@ -269,7 +269,7 @@ These relationships might help you understand the 3 styles of strings:
 
 <b>&subset;</b>
 
-<span class="set">Strings representable by `b''`</span></br>
+<span class="set">Strings representable by `b''`</span><br/>
 &equals; All Byte Strings
 
 </div>

doc/proc-func.md

@@ -149,8 +149,8 @@ doc will elaborate on these issues.
   - `camelCase`
 - tr
   - [Syntax Mode](command-vs-expression-mode.html) of call site
-  - Command Mode</td>
-  - Expression Mode</td>
+  - Command Mode
+  - Expression Mode
 - tr
   - Kinds of Parameters / Arguments
   - <!-- empty -->

doc/ysh-doc-processing.md

@@ -65,8 +65,8 @@ Design goals:
 
 ## Operations
 
-- doc('<p>') - validates it and creates a value.Obj
-- docQuery(mydoc, '#element') - does a simple search
+- `doc('<p>')` - validates it and creates a value.Obj
+- `docQuery(mydoc, '#element')` - does a simple search
 
 Constructors: