MetaPost would not accept this file. It is just for testing mptotex. non-tex material is ignored. `words' like betextify and etex_plus are OK too. Now[]verbatimtex TeX \hsize="a0 in more TeX % with comments etex (That counts even though it follows a %-sign A string "even with etex or btex in it" is ignored TeX material such as btex$a+b$ etex is often very short. btex An initial newline is now ignored. etex (as of Version 0.60) Removing the initial %-sign on any of the following lines should cause an error: % an "unbalanced string % unmatched etex % btex verbatimtex in tex mode etex % btex tex text btex more text etex. % a non-ending verbatimtex section No visible "etex" here.