rtems/docs user: spelling and grammar fixes patch (GCI 2018)

[Marçal]

Hi,
I made this patch to complete the "Improve English for rtems/docs" of GCI
2018 which solves 5 typos in the RTEMS User Manual.
The errors fixed are the following:
1. catastophic -> catastrophic
2. By using standard software components, the time and cost required to
develop sophisticated real-time applications *is* significantly reduced. ->
By using standard software components, the time and cost required to
develop sophisticated real-time applications *are* significantly reduced.
("is" (singular) does not agree with the plural compound subject "the time
and cost required to develop sophisticated real-time applications")
3. accessable -> accessible
4. on going -> ongoing
5. compontents -> components
The patch is attached to this email.
Sal
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rtems.org/pipermail/devel/attachments/20181109/94e5743c/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-user-spelling-and-grammar-fixes.patch
Type: text/x-patch
Size: 3079 bytes
Desc: not available
URL: <http://lists.rtems.org/pipermail/devel/attachments/20181109/94e5743c/attachment.bin>