* Fix following warnings:
* double quoted string containing no variables
* indentation of => is not properly aligned
* mode should be represented as a 4 digit octal value or symbolic mode
* string containing only a variable
* top-scope variable being used without an explicit namespace
* unquoted file mode
* variable not enclosed in {}
* Fix following errors:
* trailing whitespace found
* two-space soft tabs not used
* Remove quotes around class in include/require statements
Change-Id: Ia920d848e1955612a6486ec8731309e6d3a70f63
178f4b18dc