History of shader 1 change

In crates/backdrop/src/gl.rs, lines 91–100 on d7d182467382d2aa9551464dae4e326c45a0c0abae89114d9a24067691da852b. 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.