Reasons for making this change:

Cadence Incisive tool is a common HDL simulator and deserves a dedicated gitignore file (Cadence Virtuoso tool already has one in the same directory), even though it is being replaced by its sucessor Xcelium.

Links to documentation supporting these rule changes:

There is no official documentation for these files from Cadence, but the following GitHub repo lists the similar files as well (in Incisive / Xeclium part,as a proof from another person):

https://github.com/cocotb/cocotb/blob/master/.gitignore

If this is a new template:

• the offical website of its sucessor (Xcelium): https://www.cadence.com/en_US/home/tools/system-design-and-verification/simulation-and-testbench-verification/xcelium-simulator.html