Remove extra newline from end of doxygen python \code command

Remove the extra newline at the end of translation of doxygen \code
\endcode command for Python.  Update test output accordingly.

Examples/test-suite/python/doxygen_basic_translate_runme.py

@@ -50,7 +50,6 @@ Warning: This may not work as expected
 .. code-block:: c++
 
     int main() { while(true); }
-
 }"""
 )
 comment_verifier.check(inspect.getdoc(doxygen_basic_translate.function5),

Examples/test-suite/python/doxygen_translate_runme.py

@@ -25,7 +25,6 @@ Author: Zubr
 
     some test code
 
-
 Conditional comment: SOMECONDITION
 Some conditional comment
 End of conditional comment.

Source/Doxygen/pydoc.cxx

@@ -495,7 +495,7 @@ void PyDocConverter::handleCode(DoxygenEntity &tag, std::string &translatedComme
 
   // Try and remove leading newline, which is present for block \code
   // command:
-  if (code[0] == '\n')
+  if ((! code.empty()) && code[0] == '\n')
     code.erase(code.begin());
 
   translatedComment += codeIndent;
@@ -515,8 +515,12 @@ void PyDocConverter::handleCode(DoxygenEntity &tag, std::string &translatedComme
   }
 
   trimWhitespace(translatedComment);
-  if (*translatedComment.rbegin() != '\n')
-    translatedComment += '\n';
+
+  // For block commands, the translator adds the newline after
+  // \endcode, so try and compensate by removing the last newline from
+  // the code text:
+  if ((! translatedComment.empty()) && translatedComment[translatedComment.size()-1] == '\n')
+    translatedComment = translatedComment.substr(0, translatedComment.size()-1); // use translatedComment.pop_back() in C++ 11
 }
 
 void PyDocConverter::handlePlainString(DoxygenEntity &tag, std::string &translatedComment, const std::string &) {