gdb: suggest &main instead of main (address of symbol) in commands

pwndbg/commands/__init__.py

@@ -524,8 +524,15 @@ def fix_int_reraise_arg(arg) -> int:
         fixed = fix_reraise_arg(arg)
         return int(fixed)
     except pwndbg.dbg_mod.Error as e:
+        try:
+            address_value = int(fix_reraise_arg(f"&{arg}"))
+            colored_arg = message.notice(f"&{arg}")
+            suggestion = f"\nDid you mean to use {colored_arg} ? (&{arg} = {address_value:#x})"
+        except:
+            raise
+            suggestion = ""
         raise argparse.ArgumentTypeError(
-            f"couldn't convert '{arg}' ({fixed.type.name_to_human_readable}) to int: {e}"
+            f"couldn't convert '{arg}' ({fixed.type.name_to_human_readable}) to int: {e}{suggestion}"
         )