fix: update the copystr

gptme/util.py

@@ -169,7 +169,7 @@ def ask_execute(question="Execute code?", default=True) -> bool:  # pragma: no c
     termios.tcflush(sys.stdin, termios.TCIFLUSH)  # flush stdin
 
     choicestr = f"[{'Y' if default else 'y'}/{'n' if default else 'N'}]"
-    copystr = "ctrl-c to copy"
+    copystr = "[Ctrl+c] to copy"
     console.print(
         f"[bold bright_yellow on red] {question} {choicestr} {copystr if copiable else ''} [/] ",
         end="",