Sphinx syntax fixes (#9180)

get rid of warnings when converting python -> rst, force quit when they happen
fix code-blocks, always need extra line
fix invalid headers refs so they actually work

doc/esp8266wifi/generic-examples.rst

@@ -40,7 +40,8 @@ To get events to work we need to complete just two steps:
 
 1. Declare the event handler in global scope.
 
-.. code:: cpp
+.. code-block:: cpp
+
     WiFiEventHandler disconnectedEventHandler;
 
 Alternatively, it can be declared as ``static`` in both function and global scopes.
@@ -49,7 +50,8 @@ Alternatively, it can be declared as ``static`` in both function and global scop
 2. Select particular event (in this case ``onStationModeDisconnected``).
    When this event is fired the code will print out information that station has been disconnected:
 
-.. code:: cpp
+.. code-block:: cpp
+
     disconnectedEventHandler = WiFi.onStationModeDisconnected(
         [](auto&& event) {
             Serial.println("Station disconnected");
@@ -57,7 +59,8 @@ Alternatively, it can be declared as ``static`` in both function and global scop
 
 3. Disable ``disconnectedEventHandler``, so the event is no longer handled by our callback:
 
-.. code:: cpp
+.. code-block:: cpp
+
     disconnectedEventHandler = nullptr;
 
 Take note that lifetime of the callback handler is up to the app. e.g. if ``onStationModeDisconnected`` is declared in the function scope, it would be discarded immediately after the function exits.
@@ -67,7 +70,7 @@ The Code
 
 The complete code, including both methods discussed at the beginning, is provided below.
 
-.. code:: cpp
+.. code-block:: cpp
 
     #include <ESP8266WiFi.h>
 

doc/esp8266wifi/server-examples.rst

@@ -16,7 +16,6 @@ Table of Contents
 -  `The Page is Served <#the-page-is-served>`__
 -  `Get it Together <#put-it-together>`__
 -  `Get it Run <#get-it-run>`__
--  `What Else? <#what-else>`__
 -  `Conclusion <#conclusion>`__
 
 The Object