The MSI GS65 Stealth Thin series laptop contains an extra physical backslash key next to the spacebar which does not yield the correct keycode.
This pull request fixes the issue
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnMICRO-STAR*:pnU90/U100:*
KEYBOARD_KEY_e4=reserved
+# MSI GS65 Stealth Thin has a physical backslash key next to the space bar
+evdev:atkbd:dmi:bvn*:bvr*:bd*:svnMicro-Star*:pnGS65StealthThin*:pvr*
+ KEYBOARD_KEY_56=backslash
+
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# MSI
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