[windows] Seems to be a unicode issue when compiling on Windows

[mmcky]

There appears to be a unicode issue when building these lectures on the windows platform,

cake_eating_numerical.log coleman_policy_iter.log egm_policy_iter.log ifp.log markov_perf.log optgrowth_fast.log optgrowth.log

[schwabts]

Not even finding instructions for build as e.g. here