Updated Ethash (markdown)

Ethash.md

@@ -61,7 +61,7 @@ def _isprime(n):
 
 Essentially, we are keeping the size of the dataset to always be equal to the highest prime below a linearly growing function, so on average in the long term the dataset will grow roughly linearly.  Tabulated version of ``get_datasize` and `get_cachesize` have been provided in the appendix.
 
-`sha3_256` and `sha3_512` are assumed to accept word arrays or strings as input and output a word array. Many operations inside of the ethash spec operate on word arrays.
+**`sha3_256` and `sha3_512` are assumed to accept word arrays or strings as input and output a word array. Many operations inside of the ethash spec operate on word arrays.**
 
 We can now get the parameters: