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small improvements for tut1.rst (#17935)

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* small improvements for tut1.rst
* remove unneeded paragraph
* Update doc/tut1.rst

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
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Miran 2021-05-05 07:44:33 +02:00 • committed by GitHub
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doc/sets_fragment.txt
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@ -17,6 +17,9 @@ Attempting to declare a set with a larger type will result in an error:
var s: set[int64] # Error: set is too large
**Note:** Nim also offers `hash sets <sets.html>`_ (which you need to import
with `import sets`), which have no such restrictions.
Sets can be constructed via the set constructor: `{}` is the empty set. The
empty set is type compatible with any concrete set type. The constructor
can also be used to include elements (and ranges of elements):