Summary:
Fixes an issue where you could not open files that were already open with ivy.
If the file path contains a square brackets and that file is already loaded
into a buffer, ivy will throw an error when trying to open it via "files" or
"buffers".
This is an issue with the file escaping before we try and cal `buffer` passing
in the file path to go to the buffer rather than open a new buffer.
This is common with JS frameworks like next js for parameters in file based
routing.
Test Plan:
Test have been added for this change. I have also added tests for the dollar
that was previously handled.
