Cleanups by @Arachnid

EIPS/eip-689.md

@@ -1,7 +1,5 @@
-## Preamble
-
 ---
-eIP: 689
+eip: 689
 title: Address Collision of Contract Address Causes Exceptional Halt
 author: Yoichi Hirai <[email protected]>
 type: Standard Track
@@ -24,7 +22,7 @@ This EIP has no practical relevance to the main net history, but simplifies test
 
 This EIP has no effects after Constantinople fork because [EIP-86](https://github.com/ethereum/EIPs/pull/208) contains the changes proposed in this EIP. Even before the Constantinople fork, this EIP has no practical relevance because the change is visible only in case of a hash collision of keccak256.
 
-Regarding testing, this EIP releaves clients from supporting reversion of code overwriting.
+Regarding testing, this EIP relieves clients from supporting reversion of code overwriting.
 
 Regarding reasoning, this EIP establishes an invariant that non-empty code is never modified.
 
@@ -34,7 +32,7 @@ If `block.number >= 0`, when a contract creation is on an account with non-zero
 
 ## Rationale
 
-It seems unpractical to implement never-used features just for passing tests.  Client implementations will be simpler with this EIP.
+It seems impractical to implement never-used features just for passing tests.  Client implementations will be simpler with this EIP.
 
 ## Backwards Compatibility