Replace syl5reqr with eqtr3di (#4276)

This is in set.mm and iset.mm

* Add eqtr3di with the order of the hypotheses switched and the variables renamed.

* edit local copy of scripts/minimize to use "minimize_with eqtr3di/may_grow" in
place of the normal minimize

* Run "show usage syl5reqr" and copy-paste the output to a shell command like
for i in x y z; do scripts/minimize $i set.mm; done

* For theorems which had been marked "Proof modification is discouraged",
add /OVERRIDE on PROVE and SAVE NEW_PROOF in the script and run.
Check that the change to use eqtr3di is the only modification printed in the
output. (This step was needed for sineq0ALT in set.mm and nothing in iset.mm)

* Remove syl5reqr

* Repeat for iset.mm

changes-set.txt

@@ -83,7 +83,6 @@ proposed  syl5ibrcom imbitrridcom
 proposed  syl5bb    bitrid      compare to bitri or bitrd
 proposed  syl5rbb   bitr2id     compare to bitr2i or bitr2d
 proposed  syl5eq    eqtrid      compare to eqtri or eqtrd
-proposed  syl5reqr  eqtr3di     hypotheses would be switched
 proposed  syl6      imtrdi      alternate proposal: syldi
 proposed  syl6com   imtrdicom
 proposed  syl6d     imtrdid
@@ -97,6 +96,7 @@ make a github issue.)
 
 DONE:
 Date      Old       New         Notes
+10-Oct-24 syl5reqr  eqtr3di     order of hypotheses is switched
 30-Sep-24 syl5req   eqtr2id     compare to eqtr2i or eqtr2d
 27-Sep-24 syldbl2   [same]      moved from SP's mathbox to main set.mm
 27-Sep-24 fiminre2  [same]      moved from GS's mathbox to main set.mm