Add tasks for all the new languages

Task/Rep-string/Sidef/rep-string.sidef

@@ -0,0 +1,15 @@
+var arr = <1001110011 1110111011
+           0010010010 1010101010
+           1111111111 0100101101
+           0100100  101  11 00 1>;
+ 
+ arr.each { |n|
+    if (var m = /^(.+)\1+(.*$)(?(?{ substr($1, 0, length $2) eq $2 })|(?!))/.match(n)) {
+       var i = m[0].len;
+       say (n.substr(0, i),
+            n.substr(i, i).tr('01', '𝟘𝟙'),
+            n.substr(i*2));
+    } else {
+        say "#{n} (no repeat)";
+    }
+}