lib/markdown: avoid useless `to_s` on Chars

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

diff --git a/lib/markdown/markdown.nit b/lib/markdown/markdown.nit
index 4c2428f..64c7581 100644 (file)
--- a/lib/markdown/markdown.nit
+++ b/lib/markdown/markdown.nit
@@ -610,10 +610,12 @@ class MarkdownEmitter
        end
 
        # Append `c` to current buffer.
-       fun addc(c: Char) do add c.to_s
+       fun addc(c: Char) do
+               current_buffer.add c
+       end
 
        # Append a "\n" line break.
-       fun addn do add "\n"
+       fun addn do addc '\n'
 end
 
 # A Link Reference.