@@ 4,6 4,29 @@ 
 
 ;; TODO: adapt chords-above-text conversion from https://github.com/ssavitzky/Honu/blob/master/emacs/flktex-mode.el#L124
 
+;; License: MIT-License.
+
+;; Copyright (c) 1994-2020 Stephen R. Savitzky
+;; Copyright (c) 2020-2023 Arne Babenhauserheide
+;; 
+;; Permission is hereby granted, free of charge, to any person obtaining a copy
+;; of this software and associated documentation files (the "Software"), to deal
+;; in the Software without restriction, including without limitation the rights
+;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+;; copies of the Software, and to permit persons to whom the Software is
+;; furnished to do so, subject to the following conditions:
+;; 
+;; The above copyright notice and this permission notice shall be included in all
+;; copies or substantial portions of the Software.
+;; 
+;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+;; SOFTWARE.
+
 ;;; Code:
 
 ; How to write a good font=lock-mode http://ergoemacs.org/emacs/elisp_syntax_coloring.html (TODO…)