That's what I meant

algs4/src/java/.gitignore

@@ -1,28 +1,28 @@
-Average.java
-BinarySearch.java
-Cat.java
-Counter.java
-RandomSeq.java
-Shuffle.java
-StaticSETofInts.java
-Whitelist.java
-Vector.java
-Date.java
-Transaction.java
-Point2D.java
-Interval1D.java
-Interval2D.java
-ResizingArrayStack.java
-Stack.java
-ResizingArrayQueue.java
-Queue.java
-Bag.java
-Stopwatch.java
-ThreeSum.java
-ThreeSumFast.java
-DoublingTest.java
-DoublingRatio.java
-QuickFindUF.java
-QuickUnionUF.java
-WeightedQuickUnionUF.java
-UF.java
+/Average.java
+/BinarySearch.java
+/Cat.java
+/Counter.java
+/RandomSeq.java
+/Shuffle.java
+/StaticSETofInts.java
+/Whitelist.java
+/Vector.java
+/Date.java
+/Transaction.java
+/Point2D.java
+/Interval1D.java
+/Interval2D.java
+/ResizingArrayStack.java
+/Stack.java
+/ResizingArrayQueue.java
+/Queue.java
+/Bag.java
+/Stopwatch.java
+/ThreeSum.java
+/ThreeSumFast.java
+/DoublingTest.java
+/DoublingRatio.java
+/QuickFindUF.java
+/QuickUnionUF.java
+/WeightedQuickUnionUF.java
+/UF.java