Converted stray tabs to spaces

include/internal/catch_version.h

@@ -27,8 +27,8 @@ namespace Catch {
         const unsigned int buildNumber;
         const std::string branchName;
 
-	private:
-		void operator=( Version const& );
+    private:
+        void operator=( Version const& );
     };
 
     extern Version libraryVersion;