Fix Renderer errors with --enable-frozen-string-literal

[anthonykaufman]

There were several instances in which adding .b to string literals was necessary to not throw this error when --enable-frozen-string-literal was enabled.

To reproduce I used Ruby 2.7.8 with the --enable-frozen-string-literal option enabled:

$ git checkout frozen-string-literal-errors
$ rbenv local 2.7.8
$ git checkout master -- lib/combine_pdf/renderer.rb
$ rake RUBYOPT="--enable-frozen-string-literal --debug-frozen-string-literal" test

You should get 3 test errors.

[boazsegev]

Hi,

I'm sorry I missed this. Did the 1.0.29 version fix this issue, or do I still need to fix and merge?

Thanks.
B.

[anthonykaufman]

No worries!

I rebased on master and without the changes I made to lib/combine_pdf/renderer.rb in the PR, I'm still failing the tests I created to expose the issue.

[Markus-Munk-Shipmondo]

@anthonykaufman any news on this PR? I could really use it.
Great work