diff --git a/redbot/cogs/downloader/downloader.py b/redbot/cogs/downloader/downloader.py
index 7fb8be7e3..34f5d76e0 100644
--- a/redbot/cogs/downloader/downloader.py
+++ b/redbot/cogs/downloader/downloader.py
@@ -371,7 +371,8 @@ class Downloader:
             ["+ {}: {}".format(c.name, c.short or "") for c in cogs]
         )
 
-        await ctx.send(box(cogs, lang="diff"))
+        for page in pagify(cogs, ["\n"], shorten_by=16):
+            await ctx.send(box(page.lstrip(" "), lang="diff"))
 
     @cog.command(name="info")
     async def _cog_info(self, ctx, repo_name: Repo, cog_name: str):
@@ -388,7 +389,9 @@ class Downloader:
         msg = _("Information on {}:\n{}").format(cog.name, cog.description or "")
         await ctx.send(box(msg))
 
-    async def is_installed(self, cog_name: str) -> (bool, Union[Installable, None]):
+    async def is_installed(
+        self, cog_name: str
+    ) -> Union[Tuple[bool, Installable], Tuple[bool, None]]:
         """Check to see if a cog has been installed through Downloader.
 
         Parameters