PHP-CS-Fixer/.gitattributes

# @TODO 3.0 replace following `tests/... exportignore` with single `tests/ export-ignore`
tests/**/*Test.php export-ignore
tests/AbstractDoctrineAnnotationFixerTestCase.php export-ignore
tests/Differ/AbstractDifferTestCase.php export-ignore
tests/Fixtures/ export-ignore
tests/Linter/AbstractLinterTestCase.php export-ignore
tests/Report/AbstractReporterTestCase.php export-ignore
tests/Test/AbstractTransformerTestCase.php export-ignore

.appveyor.yml export-ignore
.composer-require-checker.json export-ignore
.editorconfig export-ignore
.gitattributes export-ignore
.github/ export-ignore
.gitignore export-ignore
.travis.yml export-ignore
benchmark.sh export-ignore
box.json export-ignore
check_trailing_spaces.sh export-ignore
phpmd.xml export-ignore
phpunit.xml.dist export-ignore
*       text=auto eol=lf
*.php   text whitespace=blank-at-eol,blank-at-eof,space-before-tab,tab-in-indent,tabwidth=4 diff=php
*.json  text whitespace=blank-at-eol,blank-at-eof,space-before-tab,tab-in-indent,tabwidth=4
*.yml   text whitespace=blank-at-eol,blank-at-eof,space-before-tab,tab-in-indent,tabwidth=4
*.md    text whitespace=blank-at-eol,blank-at-eof
*.rst   text whitespace=blank-at-eol,blank-at-eof
tests/Fixtures/**/* -text