Fun with (Levenshtein) Edit distances

[Stefan_Salewski]

    import std/editdistance
    
    var moduleNamespace = "pangocairo"
    var h1 = ["libpango-1.0.so.0", "libpangocairo-1.0.so.0", 
"libpangoft2-1.0.so.0"]
    
    for el in h1:
      echo editDistanceAscii(el, moduleNamespace), " ", el, " ", moduleNamespace
    
    
    Run
    
    
    $ nim c -r t.nim
    Hint: /tmp/hhh/t  [Exec]
    11 libpango-1.0.so.0 pangocairo
    12 libpangocairo-1.0.so.0 pangocairo
    14 libpangoft2-1.0.so.0 pangocairo
    
    
    Run

Goal was to pick the middle of the two strings -- obviously not a clever idea. 
But I still wonder why the distance is only 11 for the first string but 12 for 
the middle?

If you wonder why we need that, the issue was discussed in

<https://discourse.gnome.org/t/title-in-text-due-to-discourse-bug/4477>