env in rvm-0.1.38

- old
+ new

@@ -19,13 +19,11 @@
 
 if [[ -z "$environment_name" ]]; then
   usage ; exit 1
 fi
 
-rvm_ruby_string="${environment_name}" ;
-
-# Ensure the string is valid before printing an env.
-{ __rvm_ruby_string && __rvm_select && __rvm_use; }> /dev/null 2>&1
+# Exit when we encounter an unknown environment name.
+__rvm_become "$environment_name"
 
 if [[ "$?" = 0 ]]; then
   __rvm_use
   environment_file_path="$rvm_environments_path/$(__rvm_environment_identifier)"
   # Echo the path or environment file.