Fix registry shuffle and search

Author: kyb3r

cogs/plugins.py

@@ -268,7 +268,7 @@ async def plugin_enabled(self, ctx):
 
     @plugin.command(name='registry', aliases=['list'])
     @checks.has_permissions(PermissionLevel.OWNER)
-    async def plugin_registry(self, ctx, plugin_name=None):
+    async def plugin_registry(self, ctx, *, plugin_name:str=None):
         """Shows a list of all approved plugins."""
 
         embeds = []
@@ -285,9 +285,10 @@ def find_index(name):
                     return index
                 index += 1
 
-        if plugin_name and plugin_name in self.registry:
+        index = 0
+        if plugin_name in self.registry:
             index = find_index(plugin_name)
-        else:
+        elif plugin_name is not None:
             return await ctx.send(embed=discord.Embed(
                     color=discord.Color.red(), 
                     description=f'Could not find a plugin with name "{plugin_name}" within the registry.'