From 4b7f98a9a68b494a8a68250d5fe40e78e79f2e09 Mon Sep 17 00:00:00 2001
From: Oliverpool <oliverpool@hotmail.fr>
Date: Tue, 8 Sep 2015 21:17:56 +0200
Subject: [PATCH] Allow capital 'X' when string is not played

---
 patacrep/songs/chordpro/syntax.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/patacrep/songs/chordpro/syntax.py b/patacrep/songs/chordpro/syntax.py
index 80baf66f..582bae41 100644
--- a/patacrep/songs/chordpro/syntax.py
+++ b/patacrep/songs/chordpro/syntax.py
@@ -73,7 +73,7 @@ class ChordproParser(Parser):
         else:
             frets = []
             for fret in groups['frets'].split():
-                if fret == "x":
+                if fret in "xX":
                     frets.append(None)
                 else:
                     frets.append(int(fret))
@@ -112,7 +112,7 @@ class ChordproParser(Parser):
                     ^
                     (?P<key>[^\ ]*)\ *
                     (base-fret\ *(?P<basefret>[2-9]))?\ *
-                    frets\ *(?P<frets>((\d+|x)\ *)+)\ *
+                    frets\ *(?P<frets>((\d+|x|X)\ *)+)\ *
                     (fingers\ *(?P<fingers>(([0-4-])\ *)*))?
                     $
                 """,