Resolves issue 5690: accidentally skipping code in non-debug build.
diff --git a/Objects/stringlib/formatter.h b/Objects/stringlib/formatter.h
index 57e5452..b86dc8b 100644
--- a/Objects/stringlib/formatter.h
+++ b/Objects/stringlib/formatter.h
@@ -692,7 +692,7 @@
 #endif
             if (format->type == 'n')
 #ifndef NDEBUG
-                r = 
+                r =
 #endif
                     STRINGLIB_GROUPING_LOCALE(pstart, n_digits, n_digits,
                            spec.n_total+n_grouping_chars-n_leading_chars,
@@ -700,10 +700,10 @@
             else
 #ifndef NDEBUG
                 r =
+#endif
                     STRINGLIB_GROUPING(pstart, n_digits, n_digits,
                            spec.n_total+n_grouping_chars-n_leading_chars,
                            NULL, 0, "\3", ",");
-#endif
             assert(r);
     }