lib/standard: StringWriter use `plain_to_s` for fast concat

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/lib/standard/stream.nit b/lib/standard/stream.nit
index ad31a7d..ecda97e 100644 (file)
--- a/lib/standard/stream.nit
+++ b/lib/standard/stream.nit
@@ -600,7 +600,7 @@ class StringWriter
        super Writer
 
        private var content = new Array[String]
-       redef fun to_s do return content.to_s
+       redef fun to_s do return content.plain_to_s
        redef fun is_writable do return not closed
 
        redef fun write_bytes(b) do