Update description of xs.indices lunduniversity#692

Made the description of the xs.indices match the description in the compendium.

quickref/quickref.tex

@@ -808,7 +808,7 @@
   Indexing & \texttt{xs(i)  ~ xs.apply(i)} & The element of xs at index i.\\   \cline{2-3}
 
    and size: & \texttt{xs.length} & Length of sequence. Same as \texttt{size} in \texttt{Iterable}.\\\cline{2-3}
-   & \texttt{xs.indices} & Returns a \texttt{Range} extending from 0 to xs.length - 1.\\\cline{2-3}
+   & \texttt{xs.indices} & Returns a \texttt{Range} extending from 0 until xs.length.\\\cline{2-3}
    & \texttt{xs.isDefinedAt(i)} & True if i is contained in xs.indices.\\\cline{2-3}
    & \texttt{xs.lengthCompare(n)} & Returns -1 if xs is shorter than n, +1 if it is longer, else 0. \\\cline{1-3}