Convert TEXT MARKDOWNPHPEXTRA to TEXI

The TEXT file extension, associated with PHP Markdown Extra Documentation, refers to plain text files used to write and store documentation. These files are simple, human-readable, and can be easily converted to HTML using Markdown syntax. The TEXT extension is commonly used for README files, configuration files, and other documentation purposes. Markdown Extra enhances the basic Markdown syntax with additional features like tables, footnotes, and definition lists, making it a powerful tool for creating well-structured documentation.

The TEXI file extension, short for Texinfo, is a documentation format used primarily by the GNU Project for creating software manuals. Developed by Richard Stallman and Bob Chassell, it organizes content into a book-like structure and allows a single source file to generate both online and printed documentation. TEXI files are widely used in open-source projects and are recognized by their TEXI extension.