* ext/objspace/object_tracing.c: [DOC] Adjust rdoc formatting and fix
  small grammar typo


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43097 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
ChangeLog typo


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43098 b2dd03c8-39d4-4d8f-98ff-823fe69b080e