Comment # 6 on bug 1219376 from Dr. Werner Fink

Be aware that latex.ltx as well as latexrelease.sty *are* generated from
ltfiles.dtx:

 grep ltfiles.dtx tex/latex/base/latex*
 tex/latex/base/latex.ltx:%% ltfiles.dtx  (with options: `2ekernel')
 tex/latex/base/latex.ltx:%%% From File: ltfiles.dtx
 tex/latex/base/latexrelease.sty:%% ltfiles.dtx  (with options: `latexrelease')
 tex/latex/base/latexrelease.sty:%%% From File: ltfiles.dtx