Edited ch10.asciidoc with Atlas code editor

ch10.asciidoc

@@ -961,7 +961,7 @@ Once a miner using the new rules mines a block, the mining power and chain will
 
 ((("forks", "changing consensus rules", "diverging miners and difficulty")))As miners diverge into mining two different chains, the hashing power is split between the chains. The mining power can be split in any proportion between the two chains. The new rules may only be followed by a minority, or by the vast majority of the mining power.
 
-Let's assume, for example, an 80%-20% split, with the majority of the mining power using the new consensus rules. Let's also assume that the fork occurs immediately after a retargeting period.
+Let's assume, for example, an 80%–20% split, with the majority of the mining power using the new consensus rules. Let's also assume that the fork occurs immediately after a retargeting period.
 
 The two chains would each inherit the difficulty from the retargeting period. The new consensus rules would have 80% of the previously available mining power committed to them. From the perspective of this chain, the mining power has suddenly declined by 20% vis-a-vis the previous period. Blocks will be found on average every 12 minutes, representing the 20% decline in mining power available to extend this chain. This rate of block issuance will continue (barring any changes in hashing power) until 2016 blocks are mined, which will take approximately 24,192 minutes (at 12 minutes per block), or 16.8 days. After 16.8 days, a retarget will occur and the difficulty will adjust (reduced by 20%) to produce 10-minute blocks again, based on the reduced amount of hashing power in this chain.