env: fix some format error

src/uu/env/env.md

@@ -1,7 +1,7 @@
 # env
 
 ```
-{} [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...]
+env [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...]
 ```
 
 

src/uu/env/src/env.rs

@@ -23,7 +23,7 @@ use std::os::unix::process::ExitStatusExt;
 use std::process;
 use uucore::display::Quotable;
 use uucore::error::{UClapError, UResult, USimpleError, UUsageError};
-use uucore::{format_usage, show_warning, help_about, help_section, help_usage};
+use uucore::{format_usage, help_about, help_section, help_usage, show_warning};
 
 const ABOUT: &str = help_about!("env.md");
 const USAGE: &str = help_usage!("env.md");