由于.gemspec错误，我在rails中不能做任何事情，但是我不知道如何修复这个错误

I am not able to proceed with any action (even as simple as checking my rails version) because of the following error. I have no clue what I did! I appeared to have messed something up related to .gemspec, even though I don't remember doing anything strange particular. I'm new to rails, so any help would be greatly appreciated.I am not able to proceed with any action (even