Merge some string literals

Author: garydgregory

src/test/java/org/apache/commons/io/FileUtilsTest.java

@@ -3213,7 +3213,7 @@ void testWriteByteArrayToFile_WithOffsetAndLength_WithAppendOptionTrue_ShouldNot
         FileUtils.writeStringToFile(file, "This line was there before you...");
         final byte[] data = "SKIP_THIS_this is brand new data_AND_SKIP_THIS".getBytes(StandardCharsets.UTF_8);
         FileUtils.writeByteArrayToFile(file, data, 10, 22, true);
-        final String expected = "This line was there before you..." + "this is brand new data";
+        final String expected = "This line was there before you...this is brand new data";
         final String actual = FileUtils.readFileToString(file, StandardCharsets.UTF_8);
         assertEquals(expected, actual);
     }

src/test/java/org/apache/commons/io/IOUtilsMultithreadedSkipTest.java

@@ -110,7 +110,7 @@ private void testSkipFullyOnInflaterInputStream(final Supplier<byte[]> baSupplie
                                 final int c = is.read();
                                 assertEquals(expected[skipIndex], c, "failed on seed=" + seed + " iteration=" + iteration);
                             } catch (final EOFException e) {
-                                assertEquals(expected[skipIndex], is.read(), "failed on " + "seed=" + seed + " iteration=" + iteration);
+                                assertEquals(expected[skipIndex], is.read(), "failed on seed=" + seed + " iteration=" + iteration);
                             }
                         }
                     }