* tta/C/parsetexi/parser.c (add_preamble_lang_cmd): fix type name in
sizeof.

* tta/C/main/converter_types.h, tta/C/main/document_types.h
(ENCODING_CONVERSION): move ENCODING_CONVERSION to document_types.h
as it is used earlier than conversion.

* tta/perl/XSTexinfo/parser_document/OutputUnitsXS.xs,
tta/perl/XSTexinfo/parser_document/ManipulateTreeXS.xs,
tta/perl/XSTexinfo/parser_document/DocumentIndicesXS.xs,
tta/perl/XSTexinfo/parser_document/StructuringXS.xs: use non_perl_free
instead of free.

* tta/C/*/*.c, tta/maintain/*.pl, tta/perl/XSTexinfo/*.xs,
tta/perl/XSTexinfo/*/*.xs, tta/perl/XSTexinfo/*.c,
tta/perl/XSTexinfo/*/*.c: correct includes using include-what-you-use
from iwyu.