History of shader 1 change

In crates/backdrop/src/gl.rs, lines 91–100 on 17ca6cddc5347fbcfb0c04ff8e95bf25f41b3f4931d8702cda847e37608a982d. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 91,100:crates/backdrop/src/gl.rs.