Manuals: replace "file name" by "filename"

There are many more instances of "filename" or "filenames" than
of "file name" or "file names".

The winner takes it all!

(From yocto-docs rev: 13ef92bc301166c2e21d2603b2501749248dbe91)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index d5df9ae41c..7aecda0174 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -3155,7 +3155,7 @@ system and gives an overview of their function and contents.
          IMAGE_NAME ?= "${IMAGE_BASENAME}-${MACHINE}${IMAGE_VERSION_SUFFIX}"
 
    :term:`IMAGE_NAME_SUFFIX`
-      Suffix used for the image output file name - defaults to ``".rootfs"``
+      Suffix used for the image output filename - defaults to ``".rootfs"``
       to distinguish the image file from other files created during image
       building; however if this suffix is redundant or not desired you can
       clear the value of this variable (set the value to ""). For example,