capitalize error for consistency with L280

Co-authored-by: Blazej Michalik <[e-mail]>

IPython/core/magics/code.py

@@ -274,7 +274,7 b' class CodeMagics(Magics):'
             try:
                 expiry_days = int(opts.get("e", 7))
             except ValueError as e:
-                print(e.args[0])
+                print(e.args[0].capitalize())
                 return
             if expiry_days < 1 or expiry_days > 365:
                 print("Expiry days should be in range of 1 to 365.")