Update structopt to 0.3.26
Test: cd external/rust/crates && atest --host -c
Change-Id: Iaeee8c2cf42b73912e007f71bdcaeb1db91db18c
diff --git a/examples/enum_tuple.rs b/examples/enum_tuple.rs
index 0bad2e6..a88adc2 100644
--- a/examples/enum_tuple.rs
+++ b/examples/enum_tuple.rs
@@ -1,4 +1,20 @@
//! How to extract subcommands' args into external structs.
+//!
+//! Running this example with --help prints this message:
+//! -----------------------------------------------------
+//! classify 0.3.25
+//!
+//! USAGE:
+//! enum_tuple <SUBCOMMAND>
+//!
+//! FLAGS:
+//! -h, --help Prints help information
+//! -V, --version Prints version information
+//!
+//! SUBCOMMANDS:
+//! foo
+//! help Prints this message or the help of the given subcommand(s)
+//! -----------------------------------------------------
use structopt::StructOpt;