scripts/cli in rvm-0.0.56 vs scripts/cli in rvm-0.0.57

@@ -3,11 +3,11 @@
 function __rvm_meta {
   rvm_meta_author="Wayne E. Seguin"
   rvm_meta_author_email="[e-mail]"
   rvm_meta_website="http://rvm.beginrescueend.com/"
   rvm_meta_version="`cat $rvm_path/lib/VERSION.yml | tail -n 3 | sed 's/^.*: //g' | tr "\n" '.' | sed 's/\.$//'`"
-  rvm_meta_updated="2009.10.09"
+  rvm_meta_updated="2009.10.10"
 }
 
 function __rvm_version { __rvm_meta ; echo "rvm $rvm_meta_version ($rvm_meta_updated) [$rvm_meta_website]" ; }
 
 function __rvm_usage {
@@ -105,11 +105,11 @@
 
 function __rvm_parse_args {
   while [ $# -gt 0 ] ; do
     rvm_token="$1" ; shift
     case "$rvm_token" in
-      install|uninstall|path|info|setup|version|srcdir|list|reset|debug|reload|implode|update|readline|iconv|gemsync)
+      install|uninstall|path|info|setup|version|srcdir|list|reset|debug|reload|implode|readline|iconv|gemsync|update)
         rvm_action=$rvm_token
       ;;
 
       use)
         rvm_action=$rvm_token
@@ -188,12 +188,18 @@
       do|ruby|rake|gem|rubydo|rakedo|gemdo)
         if [ "$rvm_action" = "do" ] ; then rvm_action="ruby" ; fi
         rvm_action=$(echo $rvm_token | sed 's/do//g')
 
         if [ "$rvm_action" = "rake" -o "$rvm_action" = "gem" -o "$rvm_action" = "ruby" ] ; then
-          rvm_action="ruby"
-          rvm_ruby_args="$rvm_token $@"
-          rvm_parse_break=1
+          if [ -z "$1" ] ; then
+            rvm_action="error"
+            rvm_error_message="the 'ruby' and 'gem' actions must be followed by arguments."
+            rvm_parse_break=1
+          else
+            rvm_action="ruby"
+            rvm_ruby_args="$rvm_token $@"
+            rvm_parse_break=1
+          fi
         else
           if [ ! -z "$(echo $1 | awk '/^-/')" ] ; then
             unset rvm_ruby_version
           else
             if [ ! -z "$(echo $1 | awk '/^[0-9]/')" ] ; then