[rtems-docs commit] c-user: Fix typos

[Sebastian Huber]

Module:    rtems-docs
Branch:    master
Commit:    ccc58a5c666d52faaa6ef10137e85e3c6abbb25e
Changeset: http://git.rtems.org/rtems-docs/commit/?id=ccc58a5c666d52faaa6ef10137e85e3c6abbb25e

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Fri Mar 13 13:27:16 2020 +0100

c-user: Fix typos

---

 c-user/config/obsolete.rst | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/c-user/config/obsolete.rst b/c-user/config/obsolete.rst
index 329ccfa..df7d7d1 100644
--- a/c-user/config/obsolete.rst
+++ b/c-user/config/obsolete.rst
@@ -41,7 +41,7 @@ This configuration option is obsolete since RTEMS 5.1.
 CONFIGURE_GNAT_RTEMS
 --------------------
 
-This configuration option was present in all RTEMS versions since at 1997 and is
+This configuration option was present in all RTEMS versions since 1997 and is
 obsolete since RTEMS 5.1.  See also :ref:`ConfigAda`.
 
 .. index:: CONFIGURE_HAS_OWN_CONFIGURATION_TABLE
@@ -98,7 +98,7 @@ This configuration option is obsolete since RTEMS 5.1.
 CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS
 --------------------------------
 
-This configuration option was present in all RTEMS versions since at 1998 and is
+This configuration option was present in all RTEMS versions since 1998 and is
 obsolete since RTEMS 5.1.  See also :ref:`CONFIGURE_MAXIMUM_FILE_DESCRIPTORS`.
 
 .. index:: CONFIGURE_MAXIMUM_ADA_TASKS
@@ -106,7 +106,7 @@ obsolete since RTEMS 5.1.  See also :ref:`CONFIGURE_MAXIMUM_FILE_DESCRIPTORS`.
 CONFIGURE_MAXIMUM_ADA_TASKS
 ---------------------------
 
-This configuration option was present in all RTEMS versions since at 1997 and is
+This configuration option was present in all RTEMS versions since 1997 and is
 obsolete since RTEMS 5.1.  See also :ref:`ConfigAda`.
 
 .. index:: CONFIGURE_MAXIMUM_FAKE_ADA_TASKS
@@ -114,7 +114,7 @@ obsolete since RTEMS 5.1.  See also :ref:`ConfigAda`.
 CONFIGURE_MAXIMUM_FAKE_ADA_TASKS
 --------------------------------
 
-This configuration option was present in all RTEMS versions since at 1997 and is
+This configuration option was present in all RTEMS versions since 1997 and is
 obsolete since RTEMS 5.1.  See also :ref:`ConfigAda`.
 
 .. index:: CONFIGURE_MAXIMUM_GO_CHANNELS