[btcsuite/btcd] 27f7f8: txscript: Make error strings idiomatic.

[Jonathan Gillham]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 27f7f8235518af9c7f1bdc99db0cf81d2a9a1a3d
      
https://github.com/btcsuite/btcd/commit/27f7f8235518af9c7f1bdc99db0cf81d2a9a1a3d
  Author: Jonathan Gillham <jonathan.gill...@gmail.com>
  Date:   2015-08-09 (Sun, 09 Aug 2015)

  Changed paths:
    M txscript/error.go

  Log Message:
  -----------
  txscript: Make error strings idiomatic.