Fix dot file generation

mtreinish commented 3 months ago

This commit fixes a regression introduced in #1203. That PR was attempting to fix missing character escaping in some string fields but it was doing so too eagerly. This would result in invalid dot files being produced for users upgrading from rustworkx < 0.15.0 that were wrapping strings in quotes as needed previously. For example if you were setting 'color="#aaaaaa"' previously before this would become color="\"#aaaaaa\"" after #1203. In order to quickly release a 0.15.1 this commit reverts the dot generation component of #1203 but updates the code to wrap tooltip in addition to label which was what the original bug reported. In 0.16.0 we should investigate adding a flag to control the escaping behavior of the function to either decide to wrap values in quotes or not.