Reset operator-pending commands on escape

[adriafarres]

Suppose we have the text "|Hello, world", with | being the position of
the cursor. Pressing d<Esc>dw simply moves the cursor on top of the
comma instead of leaving the text as ", world".

This fixes issue VIM-1421.

I'm creating the pull request again, since on rebasing I apparently messed up the history.

[AlexPl292]

Hi @adriafarres !
Thank you for your attention to the project!
At the moment it looks like your PR doesn't handle some cases where <Esc> is mapped to any other key, or pressing <C-[>. Could you take a look at handleEditorReset and isEditorReset functions and it's usages? It might be a better place for this fix, what do you think?

[adriafarres]

You are absolutely right, Alex. In fact, this case was already being handled and I missed it. My apologies. Moving it outside of the condition seems to fix it. Let me know if there's a better way to handle this or if you would like me to add more tests.

[AlexPl292]

This might be a proper solution. And yep, I would appreciate if you could add more test cases to prove the change. I think, also <C-[>, different commands and mappings like map <C-D> <Esc> should be tested as well.

[AlexPl292]

We've got more tests here: #241
Thank you for the contribution! :)