improve handling of alt aliases

Author: DannyBen

lib/bashly/script/command.rb

@@ -27,7 +27,7 @@ def action_name
 
       # Returns all the possible aliases for this command
       def aliases
-        alt ? [name] + alt : [name]
+        [name] + alt
       end
 
       # Returns an array of alternative aliases if any

lib/bashly/views/command/usage.erb

@@ -15,7 +15,7 @@
     echo 
   fi
 
-  <%- if alt.any? -%>
+  <%- if alt&.any? -%>
   printf "<%= strings[:command_alias] % { alias: alt.join(', ') } %>\n"
   echo
   <%- end -%>