Fix minor issues of the compatibility tables

lib/docs/core/compat_tables.rb

@@ -1,7 +1,6 @@
 module CompatTables
   require 'json'
   require 'net/http'
-  require 'pry'
 
   BROWSERS = {
     'chrome' => 'Chrome',
@@ -36,7 +35,7 @@ module CompatTables
     uris = []
 
     index_json['doc']['body'].each do |element|
-      uris.push(element['value']['dataURL']) if element['type'] == 'browser_compatibility'
+      uris.push(element['value']['dataURL']) if element['type'] == 'browser_compatibility' and element['value']['dataURL']
     end
 
     uris.map! do |uri|
@@ -94,7 +93,13 @@ module CompatTables
 
     last_table_entry = html_table.at_css('tbody').last_element_child
 
+    if key == '__compat'
+      tmp = slug.split('/')
+      last_table_entry.add_child("<th><code>#{tmp.last}")
+    else
       last_table_entry.add_child("<th><code>#{key}")
+    end
+
 
     BROWSERS.keys.each do |browser_key|
       if key == '__compat'
@@ -111,6 +116,7 @@ module CompatTables
     version_removed = []
     notes = []
 
+    if json
       if json.is_a?(Array)
         json.each do |element|
 
@@ -178,6 +184,10 @@ module CompatTables
         end
       end
 
+    else
+      format_string = "<td class=bc-supports-no><div>?</div></td>"
+    end
+
     entry.add_child(format_string)
   end