Remove extra newline in beginning of doxygen python \code command

If \code is used as a block command (probably the main use case), an
extra newline was included in the translated Python comments.  This is
now removed and doxygen python test case output updated.

Examples/test-suite/python/doxygen_basic_translate_runme.py

@@ -49,7 +49,6 @@ Warning: This may not work as expected
 
 .. code-block:: c++
 
-
     int main() { while(true); }
 
 }"""

Source/Doxygen/pydoc.cxx

@@ -493,6 +493,11 @@ void PyDocConverter::handleCode(DoxygenEntity &tag, std::string &translatedComme
   std::string code;
   handleTagVerbatim(tag, code, arg);
 
+  // Try and remove leading newline, which is present for block \code
+  // command:
+  if (code[0] == '\n')
+    code.erase(code.begin());
+
   translatedComment += codeIndent;
   for (size_t n = 0; n < code.length(); n++) {
     if (code[n] == '\n') {