align: fix false positive with BOM

[ajafff]

PR checklist

• Addresses an existing issue: Incorrectly receive statements are not aligned error with align rule #2640
• New feature, bugfix, or enhancement
  • Includes tests
• Documentation update

Overview of change:

[bugfix] align: fix false positive for files with BOM
Fixes: #2640
/cc @unicron

Is there anything you'd like reviewers to focus on?

CHANGELOG.md entry:

[unicron]

Hi and thanks. Sorry, am I meant to review the PR since I was cc'd or is there a group of reviewers that does that?

[ajafff]

@unicron You're not supposed to review the code. I just tagged you here, so you can track the progress of the fix.

If you want, you can test if my fix really fixes your problem. Simply run the following commands:

# go to a directory where you want to temporarily clone the tslint repo to
git clone https://github.com/palantir/tslint.git
cd tslint
git fetch origin pull/2642/head:2642
git checkout 2642
npm install # or yarn install
npm run compile:test

# now go to your project you want to lint
node <path/to/tslint>/build/src/tslint-cli <options># replace this with the options you want pass to tslint

There may of course be other lint errors coming from rules that changed since the last release.