[glib] doc: Clarify documentation regarding g_file_replace and etags

[Ross Lagerwall <rossl src gnome org>]

commit 0728e62be8bf247f9d097822efd26312367ff133
Author: Ross Lagerwall <rosslagerwall gmail com>
Date:   Mon Sep 8 21:09:08 2014 +0100

    doc: Clarify documentation regarding g_file_replace and etags
    
    Clarify that with g_file_replace, a non-NULL etag is only checked if the
    file already exists.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736286

 gio/gfile.c |   16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)
---
diff --git a/gio/gfile.c b/gio/gfile.c
index 2e1e3cb..3e2607c 100644
--- a/gio/gfile.c
+++ b/gio/gfile.c
@@ -1724,14 +1724,14 @@ g_file_create (GFile             *file,
  * operation was cancelled, the error %G_IO_ERROR_CANCELLED will be
  * returned.
  *
- * If you pass in a non-%NULL @etag value, then this value is
- * compared to the current entity tag of the file, and if they differ
- * an %G_IO_ERROR_WRONG_ETAG error is returned. This generally means
- * that the file has been changed since you last read it. You can get
- * the new etag from g_file_output_stream_get_etag() after you've
- * finished writing and closed the #GFileOutputStream. When you load
- * a new file you can use g_file_input_stream_query_info() to get
- * the etag of the file.
+ * If you pass in a non-%NULL @etag value and @file already exists, then
+ * this value is compared to the current entity tag of the file, and if
+ * they differ an %G_IO_ERROR_WRONG_ETAG error is returned. This
+ * generally means that the file has been changed since you last read
+ * it. You can get the new etag from g_file_output_stream_get_etag()
+ * after you've finished writing and closed the #GFileOutputStream. When
+ * you load a new file you can use g_file_input_stream_query_info() to
+ * get the etag of the file.
  *
  * If @make_backup is %TRUE, this function will attempt to make a
  * backup of the current file before overwriting it. If this fails