chore: checkpoint before Python removal

vendor/flate2/examples/gzencoder-read.rs

@@ -0,0 +1,18 @@
+use flate2::read::GzEncoder;
+use flate2::Compression;
+use std::io;
+use std::io::prelude::*;
+
+// Print the GZ compressed representation of hello world
+fn main() {
+    println!("{:?}", gzencoder_read_hello_world().unwrap());
+}
+
+// Return a vector containing the GZ compressed version of hello world
+fn gzencoder_read_hello_world() -> io::Result<Vec<u8>> {
+    let mut result = Vec::new();
+    let c = b"hello world";
+    let mut z = GzEncoder::new(&c[..], Compression::fast());
+    z.read_to_end(&mut result)?;
+    Ok(result)
+}