removed trailing spaces and tabs from source and text

This commit ignores the “contrib” folder in order to prevent merge conflicts in dependencies, should these be updated via git.

code/AssetLib/X/XFileExporter.cpp

@@ -86,7 +86,7 @@ void ExportSceneXFile(const char* pFile,IOSystem* pIOSystem, const aiScene* pSce
     if (iDoTheExportThing.mOutput.fail()) {
         throw DeadlyExportError("output data creation failed. Most likely the file became too large: " + std::string(pFile));
     }
-    
+
     // we're still here - export successfully completed. Write result to the given IOSYstem
     std::unique_ptr<IOStream> outfile (pIOSystem->Open(pFile,"wt"));
     if (outfile == nullptr) {