GNOME Text Editor Framework Formula was removed
Last version was
gtef requires the following formulae to be installed:
xz 5.2.3 General-purpose data compression with high compression ratio
pkg-config 0.29.2 Manage compile and link flags for libraries
vala 0.40.0 Compiler for the GObject type system
gtksourceview3 3.24.7_1 Text view with syntax, undo/redo, and text marks
uchardet 0.0.6 Encoding detector library

Recent formula history

Tom Schoonjans gtef 2.0.1
Tom Schoonjans gtef 2.0.0
Tom Schoonjans gtef 1.0.0 (new formula)

Formula code at GitHub