COMP: Use verbatim %{ %} block for Image __array__ pythoncode

The %pythoncode { ... } form (single brace) processes its contents
through the SWIG preprocessor, so '#' comments at the start of lines
are misinterpreted as preprocessor directives:

  pyBase.i:702: Error: Unknown SWIG preprocessor directive: Explicit
  pyBase.i:706: Error: Unknown SWIG preprocessor directive: Zero

Switch to %pythoncode %{ ... %} (verbatim block) so the embedded Python
code is passed through unchanged.  This matches the form already used
by DECL_PYTHON_POINTSETBASE_CLASS and the existing __buffer__ block.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hjmjohnson

Wrapping/Generators/Python/PyBase/pyBase.i

@@ -679,7 +679,7 @@ str = str
 
 %define DECL_PYTHON_IMAGE_CLASS(swig_name)
   %extend swig_name {
-      %pythoncode {
+      %pythoncode %{
           def __array__(self, dtype=None, copy=None):
               """Return a NumPy array from this image.
 
@@ -717,7 +717,7 @@ str = str
               if copy is False:
                   return array
               return array
-      }
+      %}
   }
 %enddef