Error using Fretboard in English

[Trevor Skeggs]

The Snippet List extract for a simple lead-sheet template 
( melody, lyrics, chords and fret diagrams ) is not practical 
because it produces only trivial 3-note fretboard diagrams 
(the three lowest guitar strings are always marked as unused). 

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The Snippet included in Notation Reference 2.12.3 
(pages 230/231) uses ' predefined-guitar-fretboards.ly ' :

\version "2.12.2"
\include  "english.ly"                                            
\header { title = "Fretboard Bug" }

\include "predefined-guitar-fretboards.ly"
mychords = \chordmode { c1 f g }
        <<
           \context ChordNames {\mychords }
           \context FretBoards {\mychords }
         >>

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However, this produces the following compilation error message:

# -*-compilation-*-
Processing `I:/LilyPond/Vocal/fretboard snippet.ly'
Parsing...
C:/Program Files/My
Progs/Music/LilyPond/usr/share/lilypond/current/ly/predefined-guitar-ninth-
fretboards.ly:28:36:
error: syntax error, unexpected STRING
\storePredefinedDiagram \chordmode {
                                    cis:9}

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Notice that there is no c#9 requested in the required chord list!

The continental format "cis" gives the game away, and when
'\include  "english.ly" ' is commented-out, the snippet works.