tests: update test-releasenotes-formatting.t output

The output seems to be left outdated because running this test requires
fuzzy-wuzzy which is not generally installed.

Differential Revision: https://phab.mercurial-scm.org/D7723

tests/test-releasenotes-formatting.t

@@ -428,11 +428,11 b' Raise error on simultaneous usage of fla'
   $ hg init relnotes-raise-error
   $ cd relnotes-raise-error
   $ hg releasenotes -r . -l
-  abort: cannot use both '--list' and '--rev'
+  abort: cannot specify both --list and --rev
   [255]
 
   $ hg releasenotes -l -c
-  abort: cannot use both '--list' and '--check'
+  abort: cannot specify both --list and --check
   [255]
 
 Display release notes for specified revs if no file is mentioned