Merge pull request bitcoin#759 from ddustin/patch-1

Flipping the sentence order here for simplicity.

Author: luke-jr

bip-0174.mediawiki

@@ -43,12 +43,12 @@ risk of being defrauded.
 ==Specification==
 
 The Partially Signed Bitcoin Transaction (PSBT) format consists of key-value maps.
-Each key-value pair must have a unique key within its scope; duplicates are not allowed.
-Each map consists of a sequence of records, terminated by a <tt>0x00</tt> byte <ref>'''Why
+Each map consists of a sequence of key-value records, terminated by a <tt>0x00</tt> byte <ref>'''Why
 is the separator here <tt>0x00</tt> instead of <tt>0xff</tt>?'''
 The separator here is used to distinguish between each chunk of data. A separator of 0x00 would mean that
 the unserializer can read it as a key length of 0, which would never occur with actual keys. It can thus
-be used as a separator and allow for easier unserializer implementation.</ref>. The format
+be used as a separator and allow for easier unserializer implementation.</ref>.
+Each key-value pair must have a unique key within its scope; duplicates are not allowed. The format
 of a record is as follows:
 
 Note: <tt><..></tt> indicates that the data is prefixed by a compact size unsigned integer representing