+-A <author_file>::
+ Read a file with lines on the form
+
+ username = User's Full Name <email@addr.es>
+
+ and use "User's Full Name <email@addr.es>" as the GIT
+ author and committer for Subversion commits made by
+ "username". If encountering a commit made by a user not in the
+ list, abort.
+
+ For convenience, this data is saved to $GIT_DIR/svn-authors
+ each time the -A option is provided, and read from that same
+ file each time git-svnimport is run with an existing GIT
+ repository without -A.
+