Merge pull request #294 from polyomino24/patch-1

fix typo: xslx->xlsx

Author: dilshod

xlsx2csv.py

@@ -156,7 +156,7 @@ class XlsxValueError(XlsxException):
 
 class Xlsx2csv:
     """
-     Usage: Xlsx2csv("test.xslx", **params).convert("test.csv", sheetid=1)
+     Usage: Xlsx2csv("test.xlsx", **params).convert("test.csv", sheetid=1)
      Input:
        xlsxfile - path to file or filehandle
      options: