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- eval arg ?arg ...?
- Eval takes one or more arguments, which together
- comprise a Tcl command (or collection of Tcl commands
- separated by newlines in the usual way). Eval
- concatenates all its arguments in the same fashion as
- the concat command, passes the concatenated string to
- the Tcl interpreter recursively, and returns the result
- of that evaluation (or any error generated by it).
-