diff --git a/core/includes/file.inc b/core/includes/file.inc
index 09af50f..9bb27e9 100644
--- a/core/includes/file.inc
+++ b/core/includes/file.inc
@@ -70,11 +70,7 @@ const FILE_EXISTS_ERROR = 2;
 const FILE_STATUS_PERMANENT = 1;
 
 /**
- * Methods to manage a registry of stream wrappers.
- */
-
-/**
- * Drupal stream wrapper registry.
+ * Provides Drupal stream wrapper registry.
  *
  * A stream wrapper is an abstraction of a file system that allows Drupal to
  * use the same set of methods to access both local files and remote resources.
@@ -206,7 +202,7 @@ function file_uri_scheme($uri) {
 }
 
 /**
- * Check that the scheme of a stream URI is valid.
+ * Checks that the scheme of a stream URI is valid.
  *
  * Confirms that there is a registered stream handler for the provided scheme
  * and that it is callable. This is useful if you want to confirm a valid
@@ -232,7 +228,7 @@ function file_stream_wrapper_valid_scheme($scheme) {
 
 
 /**
- * Returns the part of an URI after the schema.
+ * Returns the part of a URI after the schema.
  *
  * @param $uri
  *   A stream, referenced as "scheme://target".
@@ -252,7 +248,7 @@ function file_uri_target($uri) {
 }
 
 /**
- * Get the default file stream implementation.
+ * Gets the default file stream implementation.
  *
  * @return
  *   'public', 'private' or any other file scheme defined as the default.
@@ -322,7 +318,7 @@ function file_stream_wrapper_get_instance_by_uri($uri) {
 }
 
 /**
- * Returns a reference to the stream wrapper class responsible for a given scheme.
+ * Returns a reference to the stream wrapper class responsible for a scheme.
  *
  * This helper method returns a stream instance using a scheme. That is, the
  * passed string does not contain a "://". For example, "public" is a scheme
@@ -418,7 +414,7 @@ function file_create_url($uri) {
 }
 
 /**
- * Check that the directory exists and is writable.
+ * Checks that the directory exists and is writable.
  *
  * Directories need to have execute permissions to be considered a directory by
  * FTP servers, etc.
@@ -460,7 +456,7 @@ function file_prepare_directory(&$directory, $options = FILE_MODIFY_PERMISSIONS)
 }
 
 /**
- * If missing, create a .htaccess file in each Drupal files directory.
+ * Creates a .htaccess file in each Drupal files directory if it is missing.
  */
 function file_ensure_htaccess() {
   file_save_htaccess('public://', FALSE);
@@ -471,7 +467,7 @@ function file_ensure_htaccess() {
 }
 
 /**
- * Creates an .htaccess file in the given directory.
+ * Creates a .htaccess file in the given directory.
  *
  * @param $directory
  *   The directory.
@@ -539,7 +535,7 @@ function file_load_multiple($fids = array(), $conditions = array()) {
 }
 
 /**
- * Load a file object from the database.
+ * Loads a single file object from the database.
  *
  * @param $fid
  *   A file ID.
@@ -556,7 +552,7 @@ function file_load($fid) {
 }
 
 /**
- * Save a file object to the database.
+ * Saves a file object to the database.
  *
  * If the $file->fid is not set a new record will be added.
  *
@@ -798,7 +794,7 @@ function file_copy(stdClass $source, $destination = NULL, $replace = FILE_EXISTS
 }
 
 /**
- * Determine whether the URI has a valid scheme for file API operations.
+ * Determines whether the URI has a valid scheme for file API operations.
  *
  * There must be a scheme and it must be a Drupal-provided scheme like
  * 'public', 'private', 'temporary', or an extension provided with
@@ -927,7 +923,7 @@ function file_unmanaged_copy($source, $destination = NULL, $replace = FILE_EXIST
 }
 
 /**
- * Given a relative path, construct a URI into Drupal's default files location.
+ * Constructs a URI to Drupal's default files location given a relative path.
  */
 function file_build_uri($path) {
   $uri = file_default_scheme() . '://' . $path;
@@ -935,8 +931,7 @@ function file_build_uri($path) {
 }
 
 /**
- * Determines the destination path for a file depending on how replacement of
- * existing files should be handled.
+ * Determines the destination path for a file.
  *
  * @param $destination
  *   A string specifying the desired final URI or filepath.
@@ -973,7 +968,7 @@ function file_destination($destination, $replace) {
 }
 
 /**
- * Move a file to a new location and update the file's database entry.
+ * Moves a file to a new location and update the file's database entry.
  *
  * Moving a file is performed by copying the file to the new location and then
  * deleting the original.
@@ -1053,8 +1048,7 @@ function file_move(stdClass $source, $destination = NULL, $replace = FILE_EXISTS
 }
 
 /**
- * Move a file to a new location without calling any hooks or making any
- * changes to the database.
+ * Moves a file to a new location without database changes or hook invocation.
  *
  * @param $source
  *   A string specifying the filepath or URI of the original file.
@@ -1083,7 +1077,7 @@ function file_unmanaged_move($source, $destination = NULL, $replace = FILE_EXIST
 }
 
 /**
- * Modify a filename as needed for security purposes.
+ * Modifies a filename as needed for security purposes.
  *
  * Munging a file name prevents unknown file extensions from masking exploit
  * files. When web servers such as Apache decide how to process a URL request,
@@ -1147,7 +1141,7 @@ function file_munge_filename($filename, $extensions, $alerts = TRUE) {
 }
 
 /**
- * Undo the effect of file_munge_filename().
+ * Undoes the effect of file_munge_filename().
  *
  * @param $filename
  *   String with the filename to be unmunged.
@@ -1160,7 +1154,7 @@ function file_unmunge_filename($filename) {
 }
 
 /**
- * Create a full file path from a directory and filename.
+ * Creates a full file path from a directory and filename.
  *
  * If a file with the specified name already exists, an alternative will be
  * used.
@@ -1215,7 +1209,7 @@ function file_create_filename($basename, $directory) {
 }
 
 /**
- * Delete a file and its database record.
+ * Deletes a file and its database record.
  *
  * If the $force parameter is not TRUE, file_usage_list() will be called to
  * determine if the file is being used by any modules. If the file is being
@@ -1276,8 +1270,7 @@ function file_delete(stdClass $file, $force = FALSE) {
 }
 
 /**
- * Delete a file without calling any hooks or making any changes to the
- * database.
+ * Deletes a file without database changes or hook invocations.
  *
  * This function should be used when the file to be deleted does not have an
  * entry recorded in the files table.
@@ -1313,7 +1306,7 @@ function file_unmanaged_delete($path) {
 }
 
 /**
- * Recursively delete all files and directories in the specified filepath.
+ * Deletes all files and directories in the specified filepath recursively.
  *
  * If the specified path is a directory then the function will call itself
  * recursively to process the contents. Once the contents have been removed the
@@ -1351,7 +1344,7 @@ function file_unmanaged_delete_recursive($path) {
 }
 
 /**
- * Determine total disk space used by a single user or the whole filesystem.
+ * Determines total disk space used by a single user or the whole filesystem.
  *
  * @param $uid
  *   Optional. A user id, specifying NULL returns the total space used by all
@@ -1619,7 +1612,7 @@ function drupal_move_uploaded_file($filename, $uri) {
 }
 
 /**
- * Check that a file meets the criteria specified by the validators.
+ * Checks that a file meets the criteria specified by the validators.
  *
  * After executing the validator callbacks specified hook_file_validate() will
  * also be called to allow other modules to report errors about the file.
@@ -1654,7 +1647,7 @@ function file_validate(stdClass &$file, $validators = array()) {
 }
 
 /**
- * Check for files with names longer than we can store in the database.
+ * Checks for files with names longer than can be stored in the database.
  *
  * @param $file
  *   A Drupal file object.
@@ -1675,7 +1668,7 @@ function file_validate_name_length(stdClass $file) {
 }
 
 /**
- * Check that the filename ends with an allowed extension.
+ * Checks that the filename ends with an allowed extension.
  *
  * @param $file
  *   A Drupal file object.
@@ -1699,7 +1692,7 @@ function file_validate_extensions(stdClass $file, $extensions) {
 }
 
 /**
- * Check that the file's size is below certain limits.
+ * Checks that the file's size is below certain limits.
  *
  * This check is not enforced for the user #1.
  *
@@ -1738,7 +1731,7 @@ function file_validate_size(stdClass $file, $file_limit = 0, $user_limit = 0) {
 }
 
 /**
- * Check that the file is recognized by image_get_info() as an image.
+ * Checks that the file is recognized by image_get_info() as an image.
  *
  * @param $file
  *   A Drupal file object.
@@ -1760,7 +1753,7 @@ function file_validate_is_image(stdClass $file) {
 }
 
 /**
- * Verify that image dimensions are within the specified maximum and minimum.
+ * Verifies that image dimensions are within the specified maximum and minimum.
  *
  * Non-image files will be ignored. If a image toolkit is available the image
  * will be scaled to fit within the desired maximum dimensions.
@@ -1818,7 +1811,7 @@ function file_validate_image_resolution(stdClass $file, $maximum_dimensions = 0,
 }
 
 /**
- * Save a string to the specified destination and create a database file entry.
+ * Saves a file to the specified destination and creates a database entry.
  *
  * @param $data
  *   A string containing the contents of the file.
@@ -1882,7 +1875,7 @@ function file_save_data($data, $destination = NULL, $replace = FILE_EXISTS_RENAM
 }
 
 /**
- * Save a string to the specified destination without invoking file API.
+ * Saves a file to the specified destination without invoking file API.
  *
  * This function is identical to file_save_data() except the file will not be
  * saved to the {file_managed} table and none of the file_* hooks will be
@@ -1920,7 +1913,7 @@ function file_unmanaged_save_data($data, $destination = NULL, $replace = FILE_EX
 }
 
 /**
- * Transfer file using HTTP to client.
+ * Transfers a file to the client using HTTP.
  *
  * Pipes a file through Drupal to the client.
  *
@@ -1953,7 +1946,9 @@ function file_transfer($uri, $headers) {
 }
 
 /**
- * Menu handler for private file transfers.
+ * Page callback: Handles private file transfers.
+ *
+ * Path: system/temporary
  *
  * Call modules that implement hook_file_download() to find out if a file is
  * accessible and what headers it should be transferred with. If one or more
@@ -1963,6 +1958,7 @@ function file_transfer($uri, $headers) {
  * If the file does not exist drupal_not_found() will be returned.
  *
  * @see hook_file_download()
+ * @see system_menu()
  */
 function file_download() {
   // Merge remainder of arguments from GET['q'], into relative file path.
@@ -2072,7 +2068,7 @@ function file_scan_directory($dir, $mask, $options = array(), $depth = 0) {
 }
 
 /**
- * Determine the maximum file upload size by querying the PHP settings.
+ * Determines the maximum file upload size by querying the PHP settings.
  *
  * @return
  *   A file size limit in bytes based on the PHP upload_max_filesize and
@@ -2096,7 +2092,7 @@ function file_upload_max_size() {
 }
 
 /**
- * Determine an Internet Media Type, or MIME type from a filename.
+ * Determines an Internet Media Type or MIME type from a filename.
  *
  * @param $uri
  *   A string containing the URI, path, or filename.
@@ -2125,7 +2121,7 @@ function file_get_mimetype($uri, $mapping = NULL) {
 }
 
 /**
- * Set the permissions on a file or directory.
+ * Sets the permissions on a file or directory.
  *
  * This function will use the 'file_chmod_directory' and 'file_chmod_file'
  * variables for the default modes for directories and uploaded/generated
@@ -2316,7 +2312,7 @@ function drupal_mkdir($uri, $mode = NULL, $recursive = FALSE, $context = NULL) {
 }
 
 /**
- * Remove a directory.
+ * Removes a directory.
  *
  * PHP's rmdir() is broken on Windows, as it can fail to remove a directory
  * when it has a read-only flag set.
@@ -2387,7 +2383,7 @@ function drupal_tempnam($directory, $prefix) {
 }
 
 /**
- * Get the path of system-appropriate temporary directory.
+ * Gets the path of system-appropriate temporary directory.
  */
 function file_directory_temp() {
   $temporary_directory = variable_get('file_temporary_path', NULL);