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The ENVIRON package
v0.2

Provides two things: a new way of defining
environments that read their contents before
processing; and, a \long version of amsmath's
\collect@body macro called \Collect@Body.

Here's an example:

  \NewEnviron{test}[3][]{"#1,#2,\BODY,#3"}
  \begin{test}[zero]{one}{last}
    three\par four
  \end{test}

Produces the equivalent of:

  "zero,one,three\par four,last"

______________
Will Robertson
wspr 81 [at] gmail [dot] com

Copyright 2007-2014
Distributed under the LaTeX Project Public License
%% ^^A Test that \RenewEnvironment works correctly: