bold please

README.md

@@ -84,7 +84,7 @@ As a rule of thumb,  anything < 5% means we can be pretty certain. Another thing
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 If trace stat at 1% <  trace stat at 5% < trace stat at 10% -> the smaller the value, the more likely that the null hypothesis is wrong
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-__BUT__
+_BUT_
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 if If trace stat at 1%  > trace stat at 5% > trace stat at 10% -> the bigger the value, the more likely that the null hypothesis is wrong