Camel-case parameter and internal names

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Author: garydgregory

src/main/java/org/apache/commons/io/FileUtils.java

@@ -3000,8 +3000,8 @@ public static File toFile(final URL url) {
         if (url == null || !"file".equalsIgnoreCase(url.getProtocol())) {
             return null;
         }
-        final String filename = url.getFile().replace('/', File.separatorChar);
-        return new File(decodeUrl(filename));
+        final String fileName = url.getFile().replace('/', File.separatorChar);
+        return new File(decodeUrl(fileName));
     }
 
     /**

src/main/java/org/apache/commons/io/FilenameUtils.java

@@ -846,7 +846,7 @@ public static String getPrefix(final String fileName) {
      * ~user               --> 6           --> named user (slash added)
      * //server/a/b/c.txt  --> 9
      * ///a/b/c.txt        --> -1          --> error
-     * C:                  --> 0           --> valid filename as only null character and / are reserved characters
+     * C:                  --> 0           --> valid file name as only null character and / are reserved characters
      * </pre>
      * <p>
      * The output will be the same irrespective of the machine that the code is running on.

src/main/java/org/apache/commons/io/filefilter/package-info.java

@@ -40,7 +40,7 @@
  * </tr>
  * <tr>
  * <td><a href="NameFileFilter.html">NameFileFilter</a></td>
- * <td>Filter based on a filename</td>
+ * <td>Filter based on a file name</td>
  * </tr>
  * <tr>
  * <td><a href="WildcardFileFilter.html">WildcardFileFilter</a></td>

src/main/java/org/apache/commons/io/package-info.java

@@ -24,7 +24,7 @@
  * <b>FileUtils</b> provides operations based around the JDK File class. These include reading, writing, copying, comparing and deleting.
  * </p>
  * <p>
- * <b>FilenameUtils</b> provides utilities based on filenames. This utility class manipulates filenames without using File objects. It aims to simplify the
+ * <b>FilenameUtils</b> provides utilities based on filenames. This utility class manipulates file names without using File objects. It aims to simplify the
  * transition between Windows and Unix. Before using this class however, you should consider whether you should be using File objects.
  * </p>
  * <p>