[nongnu] elpa/mentor updated (3f4fda68fc -> afab3a14a4)

[ELPA Syncer]

elpasync pushed a change to branch elpa/mentor.

      from  3f4fda68fc Use sparse keymap for mentor-mode-map
       new  0be5643897 Add NonGNU ELPA to README
       new  afab3a14a4 Add SPDX-License-Identifier library header


Summary of changes:
 README.org | 26 +++++++++++++-------------
 mentor.el  |  3 +++
 2 files changed, 16 insertions(+), 13 deletions(-)