Date: 2019-02-02
Ripple (total length change):
                                   drag left       drag right
                                      <               <                 
+-------------+                  +-------------+ +-------------+
+abc|12345|ABC+ ---------------> +abc|012345|ABC++abc|2345|ABC+
+-------------+                  +-------------+ +-------------+
                                   >                 >
+-------------+                  +-------------+ +-------------+
+abc|12345|ABC+ ---------------> +ab|12345|ABC+  +abcd|12345|ABC+
+-------------+                  +-------------+ +-------------+
                                         >                 >
+-------------+                  +-------------+ +-------------+
+abc|12345|ABC+ ---------------> +abc|1234|ABC+  +abc|123456|ABC+
+-------------+                  +-------------+ +-------------+
                                            <               <
+-------------+                  +-------------+ +-------------+
+abc|12345|ABC+ ---------------> +abc|12345|ZABC++abc|12345|BC+
+-------------+                  +-------------+ +-------------+

Note:
It works so in Cin5.1_20181231 and version before.