message: [c++] Copy edit coding guidelines
diff: @@ -71,7 +71,8 @@ headers for what it uses. To help avoid implicit dependencies on indirectly
  included headers, the includes are done in reverse order of generality:
  first includes from the current module, then the rest of Bond, then other
  libraries we use, then Boost, then the standard library and OS headers.
  -Additionally, within each section the headers are sorted lexicographically.
  +Additionally, within each section the headers are sorted in lexicographical
  +order.
  If this results in errors, then the header likely needs to be fixed to
  include/forward declare what it uses.
  