[FIX] developer/*: code blocks linting & fixes

invalid xml
invalid python
correct indentation

closes odoo/documentation#3001

Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

content/developer/howtos/rdtraining/12_sprinkles.rst

@@ -355,8 +355,8 @@ complete list):
 .. code-block:: xml
 
     <tree decoration-success="is_partner==True">
-        <field name="name">
-        <field name="is_partner" invisible="1">
+        <field name="name"/>
+        <field name="is_partner" invisible="1"/>
     </tree>
 
 The records where ``is_partner`` is ``True`` will be displayed in green.

content/developer/howtos/themes.rst

@@ -152,7 +152,6 @@ After that, you have to write your code inside a ``<odoo>`` tag.
 
 .. code-block:: xml
 
-   [XML]
    <?xml version="1.0" encoding="utf-8" ?>
    <odoo>
      
@@ -164,7 +163,6 @@ Almost every element and option that you create has to be placed inside a ``<tem
 
 .. code-block:: xml
 
-    [XML]
     <template id="my_title" name="My title">
       <h1>This is an HTML block</h1>
       <h2 class="lead">And this is a subtitle</h2>

content/developer/howtos/web.rst

@@ -1394,7 +1394,7 @@ merge all those contexts before sending them to the server.
 
     @api.model
     def my_method(self):
-        print self.env.context
+        print(self.env.context)
         // will print: {'lang': 'en_US', 'new_key': 'key_value', 'tz': 'Europe/Brussels', 'uid': 1}
 
 You can see the dictionary in the argument ``context`` contains some keys that

content/developer/reference/backend/actions.rst

@@ -419,7 +419,7 @@ Actions triggered automatically on a predefined frequency.
     Number of *interval_type* uom between two executions of the action
 
 ``interval_type``
-    Unit of measure of frequency interval (``minutes``, ``hours``, ``days``, ``weeks``, ``months``,
+    Unit of measure of frequency interval (``minutes``, ``hours``, ``days``, ``weeks``, ``months``)
 
 ``numbercall``
     Number of times this action has to be run.

content/developer/reference/backend/data.rst

@@ -20,8 +20,8 @@ of an XML data file is the following:
 
 .. code-block:: xml
 
-    <!-- the root elements of the data file -->
     <?xml version="1.0" encoding="UTF-8"?>
+    <!-- the root elements of the data file -->
     <odoo>
         <operation/>
         ...
@@ -188,7 +188,7 @@ values).
         </data>
 
         <record id="model_form_view" model="ir.ui.view">
-
+            ...
         </record>
     </odoo>
 

content/developer/reference/backend/views.rst

@@ -116,7 +116,7 @@ an impact on all view types.
     <tree decoration-info="state == 'draft'"
         decoration-danger="state == 'help_needed'"
         decoration-bf="state='busy'">
-      <TREE_VIEW_CONTENT>
+        <!-- TREE_VIEW_CONTENT -->
     </tree>
 
   .. warning::
@@ -1739,6 +1739,8 @@ root can have the following attributes:
     .. code-block:: xml
 
         <tree default_order="sequence,name desc">
+            ...
+        </tree>
 
 ``decoration-{$name}``
     allow changing the style of a row's text based on the corresponding
@@ -2485,7 +2487,7 @@ Possible children elements of the search view are:
     <searchpanel>
       <field name="department_id"/>
       <field name="manager_id" select="multi" domain="[('department_id', '=', department_id)]"/>
-    <searchpanel/>
+    </searchpanel>
 
   In the above example, the range of values for manager_id (manager names) available at screen
   will depend on the value currently selected for the field ``department_id``.

content/developer/reference/frontend/javascript_reference.rst

@@ -2068,7 +2068,7 @@ one2many (FieldOne2Many)
 
   .. code-block:: xml
 
-      <field name="turtles" options="{\'create_text\': \'Add turtle\'}">
+      <field name="turtles" options="{\'create_text\': \'Add turtle\'}"/>
 
 statusbar (FieldStatus)
   This is a really specialized widget for the form views. It is the bar on top
@@ -2096,7 +2096,7 @@ week_days (WeekDays)
 
   .. code-block:: xml
 
-      <widget name="week_days">
+      <widget name="week_days"/>
 
 Client actions
 ==============