That looks a lot like a Tcl extension [1]! Maybe I shouldn&#x27;t be, considering [2], but I still was  pleasantly surprised.<p>[1] Example: <a href="http:&#x2F;&#x2F;www.omanurkka.fi&#x2F;files&#x2F;test.c.txt" rel="nofollow">http:&#x2F;&#x2F;www.omanurkka.fi&#x2F;files&#x2F;test.c.txt</a><p>[2] <a href="https:&#x2F;&#x2F;tcl.wiki&#x2F;9497" rel="nofollow">https:&#x2F;&#x2F;tcl.wiki&#x2F;9497</a>