Fixing simple quotes in double quotes

Some simple quotes should be double quotes.
bug #3943 Fixing simple quotes in double quotes (ptitlazy)

This PR was merged into the 2.3 branch.

Discussion
----------

Fixing simple quotes in double quotes

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets | #3942

Some simple quotes should be double quotes, for end of line to be used as such.

Commits
-------

dc6c993 Fixing simple quotes in double quotes