chruby: Fix typo and update dotfiles in caveats.

Closes #21903.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
SonarQube 3.7

Closes #21901.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
mksh R48

Closes #21896.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
transmission 2.82

Closes #21883.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>