Fix array position in text

src/main/resources/de/moritzf/sorting/logic/sorting/shellsort.tex

@@ -30,15 +30,17 @@ \chapter*{Shellsort}
 
 \texttt{array}: array with numbers that are to be sorted
 
-\texttt{steplengths}: array with steplengths that are to be used. In our definition, steplengths are arranged in descending order (eg. steplengths = [8,4,2,1]). A practical steplengths-array must further fulfill the condition $steplengths[0] < array.length$. 
+\texttt{steplengths}: array with steplengths that are to be used. In our definition, steplengths are arranged in descending order (eg. steplengths = [8,4,2,1]). A practical steplengths-array must further fulfill the condition $steplengths[1] < array.length$. 
 
 
 \begin{lstlisting}
 procedure shellsort(array, steplengths)
 ---------------------------------------
 begin
   for each steplength in steplengths do
+  begin
     for i := 1 to steplength do
+    begin
   	  sort(array, i, steplength)   
     end
   end