Make edit strip '\r's from line endings when opening files to avoid the '?'s. See #269.

src/main/resources/assets/opencomputers/loot/OpenOS/bin/edit.lua

@@ -345,6 +345,9 @@ do
     local w, h = getSize()
     local chars = 0
     for line in f:lines() do
+      if line:sub(-1) == "\r" then
+        line = line:sub(1, -2)
+      end
       table.insert(buffer, line)
       chars = chars + unicode.len(line)
       if #buffer <= h then