Environ – A new interface for environments in LaTeX

The package provides the \collect@body command (as in amsmath), as well as a \long version \Collect@Body, for collecting the body text of an environment.

These commands are used to define a new author interface to creating new environments. For example, \NewEnviron{test}, wraps the entire environment body in square brackets, doing the right thing in ignoring leading and trailing spaces.

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