issue2551331 - Fix repeat first/last methods. The first() and last() methods for a variable defined by tal:repeat now work as documented. There is an undocumented same_part() method for repeat. It is called by first/last and can cause them to return true when not at an end of the Iterator sequence. I wrote a treatise on that function and what it does. I have no idea why it does what it does. Added tests for roundup/cgi/ZTUtils/Iterator.py Also fixes issue with roman() found while writing tests. lower wasn't being called and it was printing the lower() method signature. Doc updates in references.txt to come in a future checkin. Clarifying the repeat methods led to finding/fixing this.

--- a/roundup/cgi/templating.py	Sun Apr 07 15:33:33 2024 -0400
+++ b/roundup/cgi/templating.py	Sun Apr 07 20:52:17 2024 -0400
@@ -2143,7 +2143,7 @@
             If not editable, just display the value via plain().
 
             In addition to being able to set arbitrary html properties
-            using prop=val arguments, the thre arguments:
+            using prop=val arguments, the three arguments:
 
               y_label, n_label, u_label let you control the labels
               associated with the yes, no (and optionally unknown/empty)