GitLab

* Print newline on error message

* Output last three lines of error if update fails

* Consistent error messages & housekeeping

* Add shellcheck directive to ignore COL_TABLE
* Quoted and braced variables for codebase consistency
* Escaped newlines correctly
* Made error messages consistent (indenting and wording)
* Removed consecutive echos

* Conditional formatting consistency

* Braced, quoted and used [[ on conditionals

* Fix specific ShellCheck issues

* Fixed issues that could be safely changed without extensive testing

* Update SELinux whiptail behaviour & more

* Colourised some strings
* Fixed multiple line string indenting
* Made output consistent with existing codebase
* Removed sequential echos
* Make SELinux whiptail use "--defaultno", and change text wording

* Add help text for hostrecord, and colourise output

* this should fix the tests...
Signed-off-by: Adam Warner <adamw@rner.email>

* revert changes to `update_package_cache()` to prove tests
Signed-off-by: Adam Warner <adamw@rner.email>