ImageAltText ->
Arg Text : &String, Image_file : String

- CharIn 'Text' Text_file [ Text_file ]
' Text_file - F >Text_file< Image_file 

- Short 'Text' Length [ Text._ > Length ]
' Length = `MAX_IMG_TEXT_LENGTH

Text <- Text "\r" ''
Text <- Text "\n" ''
Text <- Text "'"  ''
Text <- Text '"'  ''

/