style fix: remove tabs and trailing spaces
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index f57db36..cb9eb14 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -2922,7 +2922,7 @@
                 return NGX_CONF_ERROR;
             }
         }
- 
+
         conf->resolver = prev->resolver;
     }