diff --git a/redbot/cogs/downloader/downloader.py b/redbot/cogs/downloader/downloader.py
index be3854e57..d064c1394 100644
--- a/redbot/cogs/downloader/downloader.py
+++ b/redbot/cogs/downloader/downloader.py
@@ -947,7 +947,7 @@ class Downloader(commands.Cog):
                         "\nIt was most likely removed without using `{prefix}cog uninstall`.\n"
                         "You may need to remove those files manually if the cog is still usable."
                         " If so, ensure the cog has been unloaded with {command}."
-                    ).format(command=inline(f"{ctx.clean_prefix}unload {failed_cogs[0]}"))
+                    ).format(command=inline(f"{ctx.clean_prefix}unload {failed_cogs[0]}")
                     )
         await self.send_pagified(ctx, message)
 
@@ -1269,48 +1269,47 @@ class Downloader(commands.Cog):
 
         - `<repo>` The repo to list cogs from.
         """
-        available_cogs = 0
-        installed = await self.installed_cogs()
+        all_installed_cogs = await self.installed_cogs()
+        installed_cogs_in_repo = [
+            cog
+            for cog in all_installed_cogs
+            if cog.repo_name == repo.name
+        ]
         installed_str = "\n".join(
-            [
-                "- {}{}".format(i.name, ": {}".format(i.short) if i.short else "")
-                for i in installed
-                if i.repo_name == repo.name
-            ]
+            "- {}{}".format(i.name, ": {}".format(i.short) if i.short else "")
+            for i in installed_cogs_in_repo
         )
+
         if not installed_str:
             installed_str = _("No cogs installed.")
-        elif len(installed) > 1:
+        elif len(installed_cogs_in_repo) > 1:
             installed_str = (
-                _("Installed Cogs: ({installed_number})\n").format(installed_number=len(installed))
-                + installed_str
+                _("Installed Cogs:\n{text}").format(text=installed_str)
             )
         else:
             installed_str = (
-                _("Installed Cog: ({installed_number})\n").format(installed_number=len(installed))
-                + installed_str
+                _("Installed Cog:\n{text}").format(text=installed_str)
             )
         available_str = "\n".join(
-            [
-                "+ {}: {}".format(cog.name, cog.short or "")
-                for cog in repo.available_cogs
-                if not (cog.hidden or cog in installed)
-            ]
+            "+ {}{}".format(cog.name, ": {}".format(cog.short) if cog.short else "")
+            for cog in repo.available_cogs
+            if not (cog.hidden or cog in installed_cogs_in_repo)
         )
-        for cog in repo.available_cogs:
-            if not (cog.hidden or cog in installed):
-                available_cogs += 1
+
+
+        available_cogs = sum(
+            not cog.hidden and cog not in installed_cogs_in_repo for cog in repo.available_cogs
+        )
+
         if not available_str:
             cogs = _("No cogs available.")
         elif available_cogs > 1:
             cogs = (
-                _("Available Cogs: ({available_number})\n").format(available_number=available_cogs)
-                + available_str
+                _("Available Cogs:\n{text}").format(text=available_str)
             )
         else:
             cogs = (
-                _("Available Cog: ({available_number})\n").format(available_number=available_cogs)
-                + available_str
+                _("Available Cog:\n{text}").format(text=available_str)
             )
         cogs = cogs + "\n\n" + installed_str
         for page in pagify(cogs, ["\n"], shorten_by=16):