Review feedback

Thanks @rob-solana!

src/introduction.md

@@ -8,7 +8,7 @@ solicitation for investment.
 
 # What is Solana?
 
-Solana is the name of an open source project that is implementing a new
+Solana is the name of an open source project that implements a
 high-performance, permissionless blockchain. Solana is also the name of a
 company headquartered in San Francisco that maintains the open source project.
 
@@ -19,8 +19,8 @@ ground up for scale. The goal of the architecture is to demonstrate there
 exists a set of software algorithms that in combination, removes software as a
 performance bottleneck, allowing transaction throughput to scale proportionally
 with network bandwidth. The architecture goes on to satisfy all three desirable
-properties of a proper blockchain: that it not only be scalable, but that it is
-also secure and decentralized.
+properties of a proper blockchain: that it not only be scalable, but that it
+also be secure and decentralized.
 
 The architecture describes a theoretical upper bound of 710 thousand
 transactions per second (tps) on a standard gigabit network and 28.4 million