This is the non-invasive version of the full Issue 2883 patch.

Documentation/notation/pitches.itely

Index: Documentation/notation/pitches.itely
diff --git a/Documentation/notation/pitches.itely b/Documentation/notation/pitches.itely
index 860babdc821d081bef8a96ed4042c699f1fc4683..ca0445dba8eb34eb9cb6ab6880b9670e74c087f0 100644
--- a/Documentation/notation/pitches.itely
+++ b/Documentation/notation/pitches.itely
@@ -7,7 +7,7 @@
     Guide, node Updating translation committishes..
 @end ignore
 
-@c \version "2.16.0"
+@c \version "2.17.6"
 
 
 @node Pitches
@@ -1473,7 +1473,7 @@ accidental style to use.  This function is called as follows:
 
 @example
 \new Staff <<
-  \accidentalStyle "voice"
+  \accidentalStyle voice
   @{ @dots{} @}
 >>
 @end example
@@ -1486,7 +1486,7 @@ scope the style should be changed.  For example, to use the same
 style in all staves of the current @code{StaffGroup}, use:
 
 @example
-\accidentalStyle #'StaffGroup "voice"
+\accidentalStyle StaffGroup.voice
 @end example
 
 The following accidental styles are supported.  To demonstrate
@@ -1529,11 +1529,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "default"
+      \accidentalStyle default
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "default"
+      \accidentalStyle default
       \musicB
     }
   >>
@@ -1549,7 +1549,7 @@ both staves.
   <<
     \context Staff = "up" @{
       %%% change the next line as desired:
-      \accidentalStyle #'Score "default"
+      \accidentalStyle Score.default
       \musicA
     @}
     \context Staff = "down" @{
@@ -1612,11 +1612,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "default"
+      \accidentalStyle default
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "default"
+      \accidentalStyle default
       \musicB
     }
   >>
@@ -1685,11 +1685,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "voice"
+      \accidentalStyle voice
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "voice"
+      \accidentalStyle voice
       \musicB
     }
   >>
@@ -1751,11 +1751,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "modern"
+      \accidentalStyle modern
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "modern"
+      \accidentalStyle modern
       \musicB
     }
   >>
@@ -1815,11 +1815,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "modern-cautionary"
+      \accidentalStyle modern-cautionary
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "modern-cautionary"
+      \accidentalStyle modern-cautionary
       \musicB
     }
   >>
@@ -1882,11 +1882,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "modern-voice"
+      \accidentalStyle modern-voice
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "modern-voice"
+      \accidentalStyle modern-voice
       \musicB
     }
   >>
@@ -1943,11 +1943,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "modern-voice-cautionary"
+      \accidentalStyle modern-voice-cautionary
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "modern-voice-cautionary"
+      \accidentalStyle modern-voice-cautionary
       \musicB
     }
   >>
@@ -2008,7 +2008,7 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "piano"
+      \accidentalStyle piano
       \musicA
     }
     \context Staff = "down" {
@@ -2068,7 +2068,7 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "piano-cautionary"
+      \accidentalStyle piano-cautionary
       \musicA
     }
     \context Staff = "down" {
@@ -2127,11 +2127,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "neo-modern"
+      \accidentalStyle neo-modern
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "neo-modern"
+      \accidentalStyle neo-modern
       \musicB
     }
   >>
@@ -2184,11 +2184,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "neo-modern-cautionary"
+      \accidentalStyle neo-modern-cautionary
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "neo-modern-cautionary"
+      \accidentalStyle neo-modern-cautionary
       \musicB
     }
   >>
@@ -2244,11 +2244,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "neo-modern-voice"
+      \accidentalStyle neo-modern-voice
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "neo-modern-voice"
+      \accidentalStyle neo-modern-voice
       \musicB
     }
   >>
@@ -2301,11 +2301,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "neo-modern-voice-cautionary"
+      \accidentalStyle neo-modern-voice-cautionary
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "neo-modern-voice-cautionary"
+      \accidentalStyle neo-modern-voice-cautionary
       \musicB
     }
   >>
@@ -2361,11 +2361,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "dodecaphonic"
+      \accidentalStyle dodecaphonic
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "dodecaphonic"
+      \accidentalStyle dodecaphonic
       \musicB
     }
   >>
@@ -2423,12 +2423,12 @@ musicB = {
   <<
     \context Staff = "up" {
       \key fis \minor
-      \accidentalStyle "teaching"
+      \accidentalStyle teaching
       \musicA
     }
     \context Staff = "down" {
       \key fis \minor
-      \accidentalStyle "teaching"
+      \accidentalStyle teaching
       \musicB
     }
   >>
@@ -2483,11 +2483,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "no-reset"
+      \accidentalStyle no-reset
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "no-reset"
+      \accidentalStyle no-reset
       \musicB
     }
   >>
@@ -2542,11 +2542,11 @@ musicB = {
 \new PianoStaff {
   <<
     \context Staff = "up" {
-      \accidentalStyle "forget"
+      \accidentalStyle forget
       \musicA
     }
     \context Staff = "down" {
-      \accidentalStyle "forget"
+      \accidentalStyle forget
       \musicB
     }
   >>
@@ -2589,7 +2589,7 @@ not need a natural sign:
 
 @lilypond[quote]
 {
-  \accidentalStyle "modern"
+  \accidentalStyle modern
   \time 2/4
   \repeat volta 2 {
     c'2
@@ -2606,12 +2606,12 @@ the accidental style to @code{forget}:
 
 @lilypond[verbatim,quote]
 forget = #(define-music-function (parser location music) (ly:music?) #{
-  \accidentalStyle "forget"
+  \accidentalStyle forget
   #music
-  \accidentalStyle "modern"
+  \accidentalStyle modern
 #})
 {
-  \accidentalStyle "modern"
+  \accidentalStyle modern
   \time 2/4
   \repeat volta 2 {
     c'2