accidental cancelation going too far?

[Paul Scott]

When running a very recent CVS version (2.7.28)  flats are remembered 
and canceled in the next bar - a sharp on that pitch shows up as a 
natural with a sharp.

I haven't run the very latest CVS because I am getting some small build 
errors that I am not yet sure about.  They may only be in the 
documentation files.

Paul Scott

\version "2.7.27"
\include "../common21a.ly"
#(set-global-staff-size 19)

\header{
  title = "Music 125 - Exercises - Page 25"
  composer = "Paul Scott"
}

{
  #(textPad 2.4)
  %\numberEveryBar
  \set Score.currentBarNumber = #10
  \time 8/4
  \set Score.currentBarNumber = #11
  \clef treble df'^\markup{ Major } ef' ff' gf' a' bf' c'' df'' | \bar "||"
  df' ef' f' gf' af' bf' c'' df'' | \bar "||" \break
  \set Score.currentBarNumber = #13
  \clef treble af'^\markup{ Natural minor } bf' cf'' df'' e'' ff'' gf'' af'' | 
\bar "||"
  af' bf' cf'' df'' ef'' ff'' gf'' af'' | \bar "||" \break
  \set Score.currentBarNumber = #14
  gs'^\markup{ Harmonic minor } as' b' cs'' ds'' e'' f'' gs'' | \bar "||"
  gs' as' b' cs'' ds'' e'' fss'' gs'' | \bar "||" \break
  \set Score.currentBarNumber = #15
  \clef treble gs'^\markup{ Natural minor } as' bs' cs'' ds'' e'' fs'' gs'' | 
\bar "||"
  gs' as' b' cs'' ds'' e'' fs'' gs'' | \bar "||" \break
}