Merge branch 'master' of git.sv.gnu.org:/srv/git/lilypond

diff --cc Documentation/extending/scheme-tutorial.itely
index 64bb01a28cd8a3b2cd1277ffa360a18375fcae05,f9c9538881eb87be368f41431079e9ce8610707d..e1a93f79ac41acc5d16672d2d018bd91c01d66a9
--- 1/Documentation/extending/scheme-tutorial.itely
--- 2/Documentation/extending/scheme-tutorial.itely
+++ b/Documentation/extending/scheme-tutorial.itely
@@@ -471,11 -474,11 +473,11 @@@ The quote mark @code{'} prevents the Sc
  @node Scheme procedures
  @subsection Scheme procedures
  
- Scheme procedures are executable scheme expressions that return
- a value resulting from their execution.,  They can also manipulate
+ Scheme procedures are executable scheme expressions that return a
+ value resulting from their execution.  They can also manipulate
  variables defined outside of the procedure.
  
 -@unnumberedsubsubsec Defining procedures
 +@subheading Defining procedures
  
  Procedures are defined in Scheme with define