From 50aa7bfddc8c1b4b92c227174a9014ec84c02091 Mon Sep 17 00:00:00 2001
From: Alexander Krotov <ilabdsf@gmail.com>
Date: Tue, 16 Oct 2018 16:23:59 +0300
Subject: Muse reader: simplify "commonPrefix" implementation

---
 src/Text/Pandoc/Readers/Muse.hs | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/Text/Pandoc/Readers/Muse.hs b/src/Text/Pandoc/Readers/Muse.hs
index 4cc6b4dff..1507ff2c9 100644
--- a/src/Text/Pandoc/Readers/Muse.hs
+++ b/src/Text/Pandoc/Readers/Muse.hs
@@ -139,11 +139,7 @@ parseMuse = do
 -- * Utility functions
 
 commonPrefix :: String -> String -> String
-commonPrefix _ [] = []
-commonPrefix [] _ = []
-commonPrefix (x:xs) (y:ys)
-  | x == y    = x : commonPrefix xs ys
-  | otherwise = []
+commonPrefix xs ys = map fst $ takeWhile (uncurry (==)) $ zip xs ys
 
 -- | Trim up to one newline from the beginning of the string.
 lchop :: String -> String
-- 
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