Don't indent Doxygen doc strings in generated Python code.

This is unnecessary and inconsistent with "builtin" case in which the
docstrings are not indented in the generated C++ code, thus making it
impossible to write tests working in both cases.

Most of the changes in this commit simply remove the extra whitespace from the
expected values in the tests.

Examples/test-suite/python/doxygen_ignore_runme.py

@@ -7,15 +7,14 @@ commentVerifier.check(doxygen_ignore.func.__doc__,
     r"""
     A contrived example of ignoring too many commands in one comment.
 
+    
 
+    
 
-
-
-
+    
     This is specific to **Python**.
 
 
     Command ignored, but anything here is still included.
 
-
     """)