move iet from sage.combinat to sage.dynamics

[videlec]

The library for iet is moved from sage.combinat.iet to sage.dynamics.interval_exchanges which seems more natural.

Apply

• attachment: trac_8386_really_just_moving-fc.patch
• attachment: trac_8386_big_clean_fc.patch
• attachment: trac_8386_assert_removal.patch

Follow-up: #14683

Depends on #12643
Depends on #13677
Depends on #14669

CC: @sagetrac-sage-combinat @sagetrac-tmonteil

Component: combinatorics

Keywords: iet

Author: Frédéric Chapoton

Reviewer: Vincent Delecroix

Merged: sage-5.12.beta0

Issue created by migration from https://trac.sagemath.org/ticket/8386

[videlec]

Attachment: trac_8386_iet_alphabet_bug.patch.gz

[nathanncohen]

comment:3

This patch really needs to be rebased (14 hunk failures) :-)

[videlec]

Changed keywords from iet combinatoric to iet

[videlec]

Description changed:

--- 
+++ 
@@ -1,4 +1,8 @@
-There was a bug for iet.Permutation comparisons. We have the following
+1) The library for iet is moved from sage.combinat.iet to sage.dynamics.interval_exchanges which seems more natural.
+
+2) The old version for iet uses two kinds of datatype for reduced and labeled versions. The new implementation makes them coherent.
+
+3) As a by product of 2), the following behavior is corrected
 
 ```
 sage: p = iet.Permutation('a b','b a')
@@ -6,5 +10,3 @@
 sage: p == q
 True
 ```
-
-The patch correct this feature (we get wrong) and rebased the datatype used for iet.Permutations.

[videlec]

Dependencies: #12643