Document typos (#351)

* fixing random typos
* Fixed typos but keeping python version the same.

docs/howto/advanced_filtering.ipynb

@@ -153,7 +153,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "As you can see we have built ourselves a collection of animals with different properties. The ``F`` object let's you access the magic methods of each typesby just prepeding two underscores and the the name of the magic method. For instance, if you want to check if a list contains a particular element you can just prepend ``__contains``. Let's use this feature to retrieve all the animals that belong to the group ``bird``:"
+    "As you can see we have built ourselves a collection of animals with different properties. The ``F`` object let's you access the magic methods of each types by just prepeding two underscores and the the name of the magic method. For instance, if you want to check if a list contains a particular element you can just prepend ``__contains``. Let's use this feature to retrieve all the animals that belong to the group ``bird``:"
    ]
   },
   {

docs/howto/transforming_inventory_data.ipynb

@@ -55,7 +55,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "You can modify inventory data (regardless of the plugin you are using) on the fly easily by password a ``transform_function`` like this:"
+    "You can modify inventory data (regardless of the plugin you are using) on the fly easily by passing a ``transform_function`` like this:"
    ]
   },
   {

docs/howto/writing_a_custom_inventory_plugin.ipynb

@@ -60,7 +60,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "A dynamic inventory basically would have to retrieve the data, rearrange in a similar way as in the example above and cal ``super``. Now, let's see how to use it:"
+    "A dynamic inventory basically would have to retrieve the data, rearrange in a similar way as in the example above and call ``super``. Now, let's see how to use it:"
    ]
   },
   {