Added compatibility with suda.vim plugin #100
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suda.vim is a plugin which lets you open files with sudo by using a protocol prefix, and/or automatically when opening a file that is missing read or write permissions.
Because the file path in vim is changed to
suda://[the file path]
this was causing the program to pass non-existent paths to range, causing it to immediately exit. So this compatibility patch just removes that prefix if suda is installed.I don't have any experience with vimscript but I don't think there should be any issues on such a small change. I moved the path code into its own function to prevent repeat code.