wrap unwrapped attributes of test_cell of `ff(IQ1,IQN1)` in quotations

[kareefardi]

Fixes https://github.com/google/globalfoundries-pdk-libs-gf180mcu_fd_sc_mcu7t5v0/issues/28

It's a good idea to open an issue first for discussion.

• [ ] Tests pass
• [ ] Appropriate changes to README are included in PR

[QuantamHD]

Would you mind changing the other pin names in the ff group to quotes as well? I want to make sure we're at least consistent within that group value.

[kareefardi]

@QuantamHD changed other pin names.

[QuantamHD]

Thanks for the contribution. 👍

[kareefardi]

@QuantamHD Thanks. Mind taking a look at the equivalent PR for the 9t https://github.com/google/globalfoundries-pdk-libs-gf180mcu_fd_sc_mcu9t5v0/pull/22/files

[QuantamHD]

Done