idris-modules: add final newline to TODO.md

Changed files
+1 -1
pkgs
development
idris-modules
+1 -1
pkgs/development/idris-modules/TODO.md
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* Build the RTS separately from Idris
* idris2nix
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* Only require gmp, rts when compiling executables
+
* Only require gmp, rts when compiling executables