[test] Refine tests. Untested draft of fix.

patacrep/songs/chordpro/lexer.py

@@ -30,6 +30,8 @@ tokens = (
     'EE',
 )
 
+literals = [ '{', '}', "\\", ' ' ]
+
 class ChordProLexer:
     """ChordPro Lexer class"""
     # pylint: disable=too-many-public-methods
@@ -150,6 +152,12 @@ class ChordProLexer:
         self.lexer.push_state('directiveargument')
         return token
 
+    @staticmethod
+    def t_literal(token):
+        r'\[{} \]'
+        t.type = t.type[1]
+        return t
+
     def error(self, token, more=""):
         """Display error message, and skip illegal token."""
         message = "Illegal character '{char}'{more}.".format(

test/test_song/latex.csg.source

@@ -0,0 +1,9 @@
+{title: & $ % # _ \} \{ ~ ^ \\}
+{artist:  & $ % # _ \} \{ ~ ^ \\}
+{album: & $ % # _ \} \{ ~ ^ \\}
+
+& $ % # _ \} \{ ~ ^ \\
+
+{start_of_chorus}
+& $ % # _ \} \{ ~ ^ \\
+{end_of_chorus}

test/test_songbook/latex_special_datadir/songs/special.csg

@@ -1,8 +1,8 @@
-{title : & % $ # _ } { ~ ^ \ }
-{by: & % $ # _ } { ~ ^ \ }
+{title : & % $ # _ \} \{ ~ ^ \\ }
+{by: & % $ # _ }\ \{ ~ ^ \\ }
 
-& % $ # _ } { ~ ^ \
+& % $ # _ }\ \{ ~ ^ \\
 
 {soc}
-  & % $ # _ } { ~ ^ \
+  & % $ # _ }\ \{ ~ ^ \\
 {eoc}