`gb` command is buggy & ignores letter case

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What did you do?

Let's say I have this code:

  images: images[0],
  imAge: image,
  selectedImage: images.selectedImage,

My cursor is on images
And I use gb

What did you expect to happen?

I expected that it would step by step select all 3 occurences of images in my code

What happened instead?

It selected image, (yes! comma too)
It also ignores letter case (ignorecase is false) so it selects imAge: Image: etc...

Technical details:

• VSCode Version:
  Version 1.11.1
  Commit d9484d12b38879b7f4cdd1150efeb2fd2c1fbf39
  Date 2017-04-06T13:58:12.954Z
  Shell 1.4.6
  Renderer 53.0.2785.143
  Node 6.5.0

• VsCodeVim Version: v0.6.17

• OS: Windows 10 Home 64bit

Start at the TypeScript entry point for the gb command and inspect any related tests. Reproduce the example with ignorecase disabled, then verify that gb selects each exact images occurrence without including the comma or matching differently cased text.