correct typos

docs/src/advanced_topics/custom_plugins.rst

@@ -34,7 +34,7 @@ In this example, we will implement a simple diffuse BSDF in Python by extending
 the :code:`BSDF` base class. The code is very similar to the diffuse BSDF
 implemented in C++ (in :code:`src/bsdf/diffuse.cpp`).
 
-The BSDF class need to implement the following 3 methods: :code:`sample`,
+The BSDF class needs to implement the following 3 methods: :code:`sample`,
 :code:`eval` and :code:`pdf`:
 
 .. literalinclude:: ../../examples/04_diffuse_bsdf/diffuse_bsdf.py

docs/src/python_interface/parsing_xml.rst

@@ -88,7 +88,7 @@ A more convinient way of constructing Mitsuba objects in Python is to use
 should follow a structure similar to the XML structure used for the Mitsuba scene description.
 
 The dictionary should always contain an entry ``"type"`` to specify the name of the plugin to
-be instanciated. Keys of the dictionary must be strings and will represent the name of the
+be instantiated. Keys of the dictionary must be strings and will represent the name of the
 properties. The type of the property will be deduced from the Python type for simple
 types (e.g. ``bool``, ``float``, ``int``, ``string``, ...). It is possible to provide another dictionary as
 the value of an entry. This can be used to create nested objects, as in the XML scene description.

src/integrators/aov.cpp

@@ -22,7 +22,7 @@ Arbitrary Output Variables integrator (:monosp:`aov`)
      respective output will be put into distinct images.
 
 
-This integrator returns one or more AOVs (Arbitraty Output Variables) describing the visible
+This integrator returns one or more AOVs (Arbitrary Output Variables) describing the visible
 surfaces.
 
 .. subfigstart::

src/libcore/python/xml_v.cpp

@@ -202,7 +202,7 @@ ref<Object> load_dict(const py::dict &dict, std::map<std::string, ref<Object>> &
             }
 
             // Nested dict with type == "ref" specify a reference to another
-            // object previously instanciated
+            // object previously instantiated
             if (type2 == "ref") {
                 if (is_scene)
                     Throw("Reference found at the scene level: %s", key);

src/shapes/instance.cpp

@@ -37,7 +37,7 @@ details on how to create instances, refer to the :ref:`shape-shapegroup` plugin.
         :width: 100%
         :align: center
 
-    The Stanford bunny loaded a single time and instanciated 1365 times (equivalent to 100 million
+    The Stanford bunny loaded a single time and instantiated 1365 times (equivalent to 100 million
     triangles)
 
 .. warning::