Merge pull request bitcoin#578 from MeshCollider/201708_fix_typos

Correct typo in BIP 144

Author: luke-jr

bip-0144.mediawiki

@@ -83,7 +83,7 @@ If the witness is empty, the old serialization format should be used.
 
 Currently, the only witness objects type supported are script witnesses which consist of a stack of byte arrays. It is encoded as a var_int item count followed by each item encoded as a var_int length followed by a string of bytes. Each txin has its own script witness. The number of script witnesses is not explicitly encoded as it is implied by txin_count. Empty script witnesses are encoded as a zero byte. The order of the script witnesses follows the same order as the associated txins.
 
-* '''Rationale for not having an independent message type with its own serialization''': this would require separate "tx" and "block" messages, and all RPC calls operating on raw transactions would need to be duplicated, or need inefficinent or nondeterministic guesswork to know which type is to be used.
+* '''Rationale for not having an independent message type with its own serialization''': this would require separate "tx" and "block" messages, and all RPC calls operating on raw transactions would need to be duplicated, or need inefficient or nondeterministic guesswork to know which type is to be used.
 
 * '''Rationale for not using just a single 0x00 byte as marker''': that would lead to empty transactions (no inputs, no outputs, which are used in some tests) to be interpreted as new serialized data.