Use SimpleFigure in Textile writer.

Author: argent0

src/Text/Pandoc/Writers/Textile.hs

@@ -1,5 +1,4 @@
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE ViewPatterns      #-}
 {- |
    Module      : Text.Pandoc.Writers.Textile
    Copyright   : Copyright (C) 2010-2021 John MacFarlane
@@ -111,8 +110,7 @@ blockToTextile opts (Div attr bs) = do
 blockToTextile opts (Plain inlines) =
   inlineListToTextile opts inlines
 
--- title beginning with fig: indicates that the image is a figure
-blockToTextile opts (Para [Image attr txt (src,T.stripPrefix "fig:" -> Just tit)]) = do
+blockToTextile opts (SimpleFigure attr txt (src, tit)) = do
   capt <- blockToTextile opts (Para txt)
   im <- inlineToTextile opts (Image attr txt (src,tit))
   return $ im <> "\n" <> capt