style: replace em and en dashes across sources

verify/call_amd64.go

@@ -57,7 +57,7 @@ const stackPad = 64
 // (the ABI0 convention shares the argument area for inputs and outputs).
 //
 // The function must be NOSPLIT (no stack growth) and must not reference
-// external symbols — the image is self-contained.
+// external symbols, the image is self-contained.
 func Call(fnAddr uintptr, args []byte) ([]byte, error) {
 	// Prepare the stack: [padding][leaveJIT addr][args...]
 	stackSize := stackPad + 8 + len(args) + 64 // padding + ret + args + safety