Replace stray tabs with spaces

src/catch2/internal/catch_run_context.cpp

@@ -242,8 +242,8 @@ namespace Catch {
     }
 
     void RunContext::benchmarkPreparing(std::string const& name) {
-		m_reporter->benchmarkPreparing(name);
-	}
+        m_reporter->benchmarkPreparing(name);
+    }
     void RunContext::benchmarkStarting( BenchmarkInfo const& info ) {
         m_reporter->benchmarkStarting( info );
     }