Merge branch 'pr-368'

This closes #368

Author: kinow

src/changes/changes.xml

@@ -189,6 +189,9 @@ The <action> type attribute can be add,update,fix,remove.
       <action dev="ggregory" type="fix" due-to="Marc Wrobel">
         Fix minor typos #367
       </action>
+      <action issue="IO-776" dev="kinow" type="fix" due-to="Chris Povirk">
+        Fix parameters to requireNonNull call in DeferredOutputSteam #368.
+      </action>
       <!-- ADD -->
       <action type="add" dev="ggregory" due-to="Gary Gregory">
         Add GitHub coverage.yml.

src/main/java/org/apache/commons/io/output/DeferredFileOutputStream.java

@@ -141,7 +141,7 @@ public DeferredFileOutputStream(final int threshold, final int initialBufferSize
     public DeferredFileOutputStream(final int threshold, final int initialBufferSize, final String prefix,
         final String suffix, final File directory) {
         this(threshold, null, prefix, suffix, directory, initialBufferSize);
-        Objects.requireNonNull("prefix", prefix);
+        Objects.requireNonNull(prefix, "prefix");
         if (initialBufferSize < 0) {
             throw new IllegalArgumentException("Initial buffer size must be at least 0.");
         }