style fix: remove trailing space

src/http/modules/ngx_http_dav_module.c

diff --git a/src/http/modules/ngx_http_dav_module.c b/src/http/modules/ngx_http_dav_module.c
index 7c3cb9e..09dac0e 100644
--- a/src/http/modules/ngx_http_dav_module.c
+++ b/src/http/modules/ngx_http_dav_module.c
@@ -599,7 +599,7 @@
     {
          ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                        "both URI \"%V\" and \"Destination\" URI \"%V\" "
-                       "should be either collections or non-collections", 
+                       "should be either collections or non-collections",
                        &r->uri, &dest->value);
          return NGX_HTTP_CONFLICT;
     }