Fixed two Python 3.7 types

lib/docs/filters/python/clean_html.rb

@@ -22,10 +22,12 @@ module Docs
           end
         end
 
+        unless @levelRegexp.nil?
           css('h2', 'h3', 'h4').each do |node|
             node.inner_html = node.inner_html.remove @levelRegexp
           end
         end
       end
     end
+  end
 end

lib/docs/filters/python/entries_v3.rb

@@ -2,9 +2,11 @@ module Docs
   class Python
     class EntriesV3Filter < Docs::EntriesFilter
       REPLACE_TYPES = {
+        'contextvars — Context Variables'          => 'Context Variables',
         'Cryptographic'                            => 'Cryptography',
         'Custom Interpreters'                      => 'Interpreters',
         'Data Compression & Archiving'             => 'Data Compression',
+        'email — An email & MIME handling package' => 'Email',
         'Generic Operating System'                 => 'Operating System',
         'Graphical User Interfaces with Tk'        => 'Tk',
         'Internet Data Handling'                   => 'Internet Data',