Crash when entering number key twice in Normal mode
### Version

moe v0.3.0

Git hash: 1d16bfe2e885f08873f930c436ecf6ff2c2989ee
Build type: Debug

### Environment

OS: Arch
Terminal: Alacritty

### Category

Major — The software does not fulfill the task it is designed for.

### Steps to Reproduce

1. moe - Start moe
2. `10` - Enter number key twice

### Detailed Description

/home/fox/git/moe/src/moe.nim(104) moe
 /home/fox/git/moe/src/moe.nim(100) main
/home/fox/git/moe/src/moepkg/mainloop.nim(490) editorMainLoop
/home/fox/git/moe/src/moepkg/mainloop.nim(229) execEditorCommand
/home/fox/git/moe/src/moepkg/mainloop.nim(200) isExecMacroCommand
/home/fox/.choosenim/toolchains/nim-2.0.0/lib/system/fatal.nim(53) sysFatal
Error: unhandled exception: index 2 not in 0 .. 1 [IndexDefect]