Code tidy.

question.php

stack/cas/ast.container.class.php

stack/cas/castext2/block.interface.php

stack/cas/castext2/blocks/commonstring.block.php

stack/cas/castext2/blocks/define.block.php

stack/cas/castext2/blocks/foreach.block.php

stack/cas/castext2/blocks/htmlformat.block.php

stack/cas/castext2/blocks/if.block.php

stack/cas/castext2/blocks/jsxgraph.block.php

stack/cas/castext2/blocks/latex.block.php

stack/cas/castext2/blocks/raw.block.php

stack/cas/castext2/blocks/root.specialblock.php

stack/cas/castext2/blocks/textdownload.block.php

stack/cas/parsingrules/602_castext_simplifier.filter.php

...rsingrules/610_castext_static_string_extractor.filter.php

stack/cas/parsingrules/901_remove_comments.filter.php

stack/cas/parsingrules/998_security.filter.php