Handling escaped single quotes within comments.

[grzegorzk]

If comments were containing escaped single quote then script generated by pgquarrel was broken. Simple fix to use dollar-quotes fixes the problem.

[eulerto]

Good catch! [Looking into your PR...] I'm not against dollar-quoting but I prefer the traditional way. pgquarrel tries to mimic pg_dump output as much as possible. Since comment is used only to print a SQL command, why don't use PQescapeLiteral or quote_literal in getXXX functions?

[grzegorzk]

I thought about going through whole code base and wherever it would make sense replacing '%s' with $QUOT$%s$QUOT$ but thought it begs for different solution (changes I made fix my immediate need but if I have some time I'll look into getXXX).

[grzegorzk]

If you are interested I also got your tests running within docker (to make it easier to test without having to install all of the dependencies locally)

[grzegorzk]

quote_literal was introduced in version 9.4 so not an option since you support 9.0+. Same with PQescapeLiteral.

[grzegorzk]

I ended up adding new method to your common.c, you might not like the fact the string replacement was copied from stack overflow - it was almost decade since I have done C last time.

[grzegorzk]

I added escaping for enum labels too.

[eulerto]

Commit 725406a implements it as I suggested in #63 (comment)