Fix `cargo-uninstall`.

With this patch users can type `cargo help uninstall` or `cargo
uninstall -h` and it will display the `USAGE` message as it was supposed
to.

Before the patch the command would display an error message about
invalid arguments.

Fixes #2138.

diff --git a/src/bin/uninstall.rs b/src/bin/uninstall.rs
index 20d4b5799141683d0b8de9842c0cfd09ea082ec1..e78bf605f38fb997aee728439fe7ae9063cf7dc6 100644 (file)
--- a/src/bin/uninstall.rs
+++ b/src/bin/uninstall.rs
@@ -17,6 +17,7 @@ Remove a Rust binary
 
 Usage:
     cargo uninstall [options] <spec>
+    cargo uninstall (-h | --help)
 
 Options:
     -h, --help                Print this message