BLD: Remove csv dialect warning in io.rst (pandas-dev#15177)

gfyoung · AnkurDedania · commit 20f63bd6dd18 · 2017-03-21T11:16:55.000-05:00
diff --git a/doc/source/io.rst b/doc/source/io.rst
@@ -419,6 +419,7 @@ finds the closing double quote.
 We can get around this using ``dialect``
 
 .. ipython:: python
+   :okwarning:
 
    dia = csv.excel()
    dia.quoting = csv.QUOTE_NONE
