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Issue description

Description:  rh0020l-10.0 + The following content is incorrect: https://role.rhu.redhat.com/rol-rhu/app/courses/rh199-10.0/pages/ch05 

"In the first example, the permissions for the student user are the first set of three characters: rw. The student user has read and write permissions on the test file, but not execute permission. The second set of three characters are the permissions for the student group: -rw. The student group has read and write permissions on the test file, but not execute permission. The third set of three characters are the permissions for all other users: r- Other users have only read permission on the test file."

The permissions are written as 'rwx' and thus should be represented as rw- instead of -rw. This is especially problematic because the course references 
```
$ ls -l test
rw-rw-r-. 1 student student 0 Mar 8 17:36 test
```
Which does lead to incorrect interpretation of the first character (which is indicating the file type and not permissions). 

Steps to reproduce:

Workaround:

Expected result: