Fix a few docstring typos

panda/src/display/pythonGraphicsWindowProc.h

@@ -21,7 +21,7 @@
 #ifdef HAVE_PYTHON
 
 /**
- * Extends GraphicsWindowProc to provde callback functionality to a python
+ * Extends GraphicsWindowProc to provide callback functionality to a Python
  * program.
  */
 class PythonGraphicsWindowProc: public GraphicsWindowProc,

panda/src/display/windowProperties.h

@@ -224,7 +224,7 @@ private:
     S_raw_mice             = 0x08000,
   };
 
-  // This bitmask represents the truefalse settings for various boolean flags
+  // This bitmask represents the true/false settings for various boolean flags
   // (assuming the corresponding S_* bit has been set, above).
   enum Flags {
     F_undecorated    = S_undecorated,

panda/src/gobj/lens.cxx

@@ -351,7 +351,7 @@ clear_custom_film_mat() {
  * nearly perpendicular to the center of the frustum as possible.  Without
  * this bit, the orientation camera plane is defined by position of the four
  * points (which should all be coplanar).  With this bit, the camera plane is
- * arbitarary, and may be chosen so that the four points do not themselves lie
+ * arbitrary, and may be chosen so that the four points do not themselves lie
  * in the camera plane (but the points will still be within the frustum).
  *
  * FC_off_axis - This allows the resulting frustum to be off-axis to get the

panda/src/putil/pythonCallbackObject.h

@@ -23,7 +23,7 @@
 
 /**
  * This is a specialization on CallbackObject to allow a callback to directly
- * call an arbitarary Python function.  Powerful!  But use with caution.
+ * call an arbitrary Python function.  Powerful!  But use with caution.
  */
 class PythonCallbackObject : public CallbackObject {
 PUBLISHED: