Fixed the cursor position in some Rust snippets

nvim/snippets/rust.snippets

@@ -4,13 +4,10 @@ snippet match
 	}
 
 snippet envinit
-	env_logger::init();
+	env_logger::init();$0
-	$0
 
 snippet VERSION
-	const VERSION: Option<&'static str> = option_env!("CARGO_PKG_VERSION");
+	const VERSION: Option<&'static str> = option_env!("CARGO_PKG_VERSION");$0
-	$0
 
 snippet start
-	log::info!("Starting up ${1:name} v{}...", VERSION.unwrap_or("???");
+	log::info!("Starting up ${1:name} v{}...", VERSION.unwrap_or("???"));$0
-	$0