(occur-accumulate-lines, occur-engine):

(occur-accumulate-lines, occur-engine):
Fontify unfontified matching lines in the source buffer
before copying them.
(occur-engine): Don't put mouse-face on context lines.
(occur-next-error): Set point to line beginning/end
before searching for prev/next property to skip multiple
matches on a line (not supported by occur engine).
Remove redundant prefix-numeric-value.