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- COMMENTS
- If the first non-blank character in a command is #, then
- everything from the # up through the next newline character
- is treated as a comment and ignored. When comments are
- embedded inside nested commands (e.g. fields enclosed in
- braces) they must have properly-matched braces (this is
- necessary because when Tcl parses the top-level command it
- doesn't yet know that the nested field will be used as a
- command so it cannot process the nested comment character as
- a comment).
-