Fix powershell cat invocation to ensure correct encoding and line ending. (#16193)
Fix powershell cat invocation to ensure correct encoding and line ending. (#16193)

* Fix powershell cat invocation to ensure correct encoding and line ending.

* Restore original flow for non-Windows platforms

* Reformat code to get rid of multi-line ?: expression

* Double quotes to single quotes

flutter/flutter,tvolkert/flutter,cbracken/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,flutter/flutter,cbracken/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,Hixie/flutter,tvolkert/flutter,cbracken/flutter,Hixie/flutter,tvolkert/flutter,cbracken/flutter,tvolkert/flutter,flutter/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,cbracken/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,cbracken/flutter,cbracken/flutter,cbracken/flutter,Hixie/flutter,cbracken/flutter,Hixie/flutter