If keeping a nice and tidy manual is so serious a labor, why not let experienced players contribute small paragraphs, corrections, and other small and manageable changes that you would review, edit, and include into the manual?
For example, in this thread I have learned
new things about assaults which might be included in a single place in the manual rather than distributed all over. MP's for an assault are specified in the change log, whereas the definition of it is simply missing. In the natural order of narration, you first define a thing and then describe it.