convert: properly escape some single-backslashes. (issue2401042)

[percival . music . ca]

Reviewers: ,

Message:
I noticed a few weird error messages while testing convert-ly on the
docs.

Description:
convert: properly escape some single-backslashes.

Please review this at http://codereview.appspot.com/2401042/

Affected files:
  M python/convertrules.py


Index: python/convertrules.py
diff --git a/python/convertrules.py b/python/convertrules.py
index  
992d371617863f5c1e5fde31ff1c66769e455318..d1bffcb37742e2b13e0f78235918b2d8411eb633  
100644
--- a/python/convertrules.py
+++ b/python/convertrules.py
@@ -2989,7 +2989,7 @@ def conv(str):
     return re.sub(r'\bfeta(Number|Dynamic)', 'fetaText', str)

 @rule ((2, 13, 18),
-       _ ("\RemoveEmpty*StaffContext -> \*Staff \RemoveEmptyStaves"))
+       _ ("\\RemoveEmpty*StaffContext -> \*Staff \\RemoveEmptyStaves"))
 def conv(str):
     str = re.sub (r"\\RemoveEmpty(|Drum|Rhythmic|Tab)StaffContext",
                   r"\\\1Staff \\RemoveEmptyStaves",
@@ -3006,7 +3006,7 @@ def conv (str):
     return str

 @rule ((2, 13, 29),
-       _ ("Eliminate beamSettings, beatLength, \setBeatGrouping,  
\overrideBeamSettings and \revertBeamSettings\n\
+       _ ("Eliminate beamSettings, beatLength, \\setBeatGrouping,  
\\overrideBeamSettings and \\revertBeamSettings\n\
 \"accordion.accEtcbase\" -> \"accordion.etcbass\""))
 def conv(str):
     def sub_acc (m):
@@ -3024,11 +3024,11 @@ def conv(str):
                  sub_acc, str)
     if re.search(r'overrideBeamSettings', str):
         stderr_write("\n")
-        stderr_write(NOT_SMART % _("\overrideBeamSettings.  Use \set  
beamExceptions or \overrideTimeSignatureSettings.\n"))
+        stderr_write(NOT_SMART % _("\\overrideBeamSettings.  Use \\set  
beamExceptions or \\overrideTimeSignatureSettings.\n"))
         stderr_write(UPDATE_MANUALLY)
     if re.search(r'revertBeamSettings', str):
         stderr_write("\n")
-        stderr_write(NOT_SMART % _("\revertBeamSettings. Use \set  
beamExceptions or \revertTimeSignatureSettings.\n"))
+        stderr_write(NOT_SMART % _("\\revertBeamSettings. Use \\set  
beamExceptions or \\revertTimeSignatureSettings.\n"))
         stderr_write(UPDATE_MANUALLY)
     if re.search(r'beamSettings', str):
         stderr_write("\n")