Fixes #174. Insert boilerplate correctly where comment on first line.

[micaherne]

This fixes #174

I've added a test fixture to make sure it works as expected. I'd rather there was a blank line between the boilerplate and the original comment but I can't find a way to do this that doesn't either break other tests, or require a lot of complicated code, so hopefully what it's doing is acceptable.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.11%. Comparing base (a0bfb12) to head (8965b35).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #175   +/-   ##
=========================================
  Coverage     98.11%   98.11%           
- Complexity      950      951    +1     
=========================================
  Files            40       40           
  Lines          2811     2816    +5     
=========================================
+ Hits           2758     2763    +5     
  Misses           53       53           

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[micaherne]

I'm not sure what to do about the code coverage failure here. I haven't really changed the lines it's complaining about, just moved them. They'll presumably only be called now if there is a PHPCS tag on the first line but I'm not sure I quite understand how that is supposed to work so I don't think I can provide a test file.

[stronk7]

Thanks @micaherne , I think that's all we needed, now we have a "proof" of the use case behind that code branch.

I'm approving this now, would be great if the remaining indentation detail is fixed. Will merge then, thanks!

[micaherne]

Oops I don't know how I managed that! That's it fixed now :)