Commits on Nov 12, 2021

1. Fix windows compatibility …

   Previously I made the assumption that the filename would be the first part of the error message for a syntax error before the colon `:` while this is false, it is especially false on windows where every path starts with a drive letter and a colon such as `c://hello/world.rb`.
   
   This commit fixes that problem by checking for the file on disk and appending more parts to the string.
   
   This is not foolproof because an error message might be possible that someone is using a colon with a file that actually exists in front of it like:
   
   ```
   /lol/foo.rb:imactuallyadirectory/realfile.rb
   ```
   
   In this case if `/lol/foo.rb` existed then it would quit looking.
   
   While I'm noting this edge case for completeness, I am not currently handling it. I think case that would be rare. 
   
   When SyntaxError is refactored in Ruby 3.2 then we don't have to rely on parsing out filenames anymore. 
   
   
   Close #111

   

   schneems committed Nov 12, 2021
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