Generated C code has strings broken by newlines

[ReGuess]

As the title says. The source of the issue is in titablegen.py#L257, where the multi-line string lacks an r prefix.

[elfprince13]

Can you given an example of an input that triggers this issue?

[ReGuess]

Simply running the provided build.sh file with any xml file from merth's TokenIDE repo.
If it helps, here's the versions of the tools I'm using:

lex --version: flex 2.6.4
gcc --version: gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
python2 --version: Python 2.7.17