RTEMS | cpukit/libmisc/shell: Remove shell prompt carriage return (!272)

[Kinsey Moore (@opticron)]

Kinsey Moore created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/272

Project:Branches: opticron/rtems:shell-cr-fix to rtems/rtos/rtems:main
Author:   Kinsey Moore
Assignee: Kinsey Moore



## Summary

cpukit/libmisc/shell: Remove shell prompt carriage return

This removes the carriage return printed before the shell prompt as it
can cause other output to be overwritten unexpectedly. This was
discovered when using the "cat" shell command on a file whose content
contained no trailing \n\r and was short enough to be entirely swallowed
by the prompt.


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