fix a code example found looking through commits

Dante-Broggi · web-flow · commit 43f79dfba831 · 2018-06-08T06:54:57.000-04:00
diff --git a/lib/SILOptimizer/SILCombiner/SILCombinerMiscVisitors.cpp b/lib/SILOptimizer/SILCombiner/SILCombinerMiscVisitors.cpp
@@ -485,7 +485,7 @@ static SILValue isConstIndexAddr(SILValue val, unsigned &index) {
 /// Example in SIL pseudo code:
 ///     %0 = string_literal "abc"
 ///     %1 = integer_literal 2
-///     %2 = index_addr %0, %2
+///     %2 = index_addr %0, %1
 ///     %3 = load %2
 /// ->
 ///     %3 = integer_literal 'c'
