style fix: remove tabs

src/http/ngx_http_core_module.c

diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 2d47027..4c2f96f 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -3904,7 +3904,7 @@
         }
 
         err->value = cv;
-	err->args = args;
+        err->args = args;
     }
 
     return NGX_CONF_OK;