Update cheatsheet.en.md

5 years ago · 52f46b1c21
1 changed files with 1 additions and 1 deletions
--- a/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.en.md
+++ b/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.en.md
@ -1,5 +1,5 @@
 --
 title: 'new course  : overview'
 title: Mirrors
 published: true
 routable: true
 visible: false