Vendor things

third-party/vendor/flate2/examples/gzbuilder.rs

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+use flate2::Compression;
+use flate2::GzBuilder;
+use std::fs::File;
+use std::io;
+use std::io::prelude::*;
+
+// Compresses content of a text file into a gzip file
+fn main() {
+    sample_builder().unwrap();
+}
+
+// GzBuilder opens a file and writes a sample string using Builder pattern
+fn sample_builder() -> Result<(), io::Error> {
+    let f = File::create("examples/hello_world.txt.gz")?;
+    let mut gz = GzBuilder::new()
+        .filename("hello_world.txt")
+        .comment("test file, please delete")
+        .write(f, Compression::default());
+    gz.write_all(b"hello world")?;
+    gz.finish()?;
+    Ok(())
+}