During some minimization efforts on the previous released version 28.2-jre, I noticed a spurious file in the published version on maven central:

```
tn@proteus:~/Downloads$ unzip -l guava-28.2-jre.jar  | grep swp
    16384  2019-09-18 17:29   com/google/common/collect/.ImmutableListMultimap.java.swp
```

Looks like an transient artefact from an editor that slipped into the release. It is not present in the android variant or in older releases (I checked at least 28.1-jre).

Minor things that can not be changed anymore but maybe a trigger for improvement of future releases.

Edit: I noticed that 29.0 has been released that does not contain this spurious file.
* @since 20.0
   */
  @Beta
  public static <T> FluentIterable<T> concat(
      final Iterable<? extends Iterable<? extends T>> inputs) {
    checkNotNull(inputs);
    return new FluentIterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return Iterators.concat(Iterators.transform(inputs.iterator(), Iterables.<T>toIterator()));
      }
    };
  }
  
  private static <T> FluentIterable<T> concatNoDefensiveCopy(
      final Iterable<? extends T>... inputs) {
    for (Iterable<? extends T> input : inputs) {
      checkNotNull(input);
    }
    return new FluentIterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return Iterators.concat(
            
            new AbstractIndexedListIterator<Iterator<? extends T>>(inputs.length) {
              @Override
              public Iterator<? extends T> get(int i) {
                return inputs[i].iterator();
              }
            });