[texhax] Low-level TeX question: string substitution macro

[Tom Schneider]

Folks, please don't top post and remove all irrelevant material.  Thanks.

  Dr. Thomas D. Schneider
  National Institutes of Health
  National Cancer Institute
  Center for Cancer Research Nanobiology Program
  Molecular Information Theory Group
  Frederick, Maryland  21702-1201
  schneidt at mail.nih.gov
  permanent email: toms at alum.mit.edu
  http://www.ccrnp.ncifcrf.gov/~toms/