fix: Replace io.redirect_stdout with contextlib.redirect_stdout for stdout redirection

cogs/eval_cog.py

@@ -3,6 +3,7 @@ from discord.ext import commands
 import io
 import textwrap
 import traceback
+import contextlib
 
 class EvalCog(commands.Cog):
     def __init__(self, bot):
@@ -41,10 +42,10 @@ class EvalCog(commands.Cog):
             exec(to_compile, env)
         except Exception as e:
             return await ctx.send(f'```py\n{e.__class__.__name__}: {e}\n```')
-
         func = env['func']
         try:
-            with io.redirect_stdout(stdout):
+            with contextlib.redirect_stdout(stdout):
+                ret = await func()
                 ret = await func()
         except Exception as e:
             value = stdout.getvalue()