Fix several instances of doubled words

One in an exception; the rest in docblocks.
Merge branch '2.1' into 2.2

* 2.1:
  Fix several instances of doubled words
  [Finder] Fix iteration fails with non-rewindable streams
  [Finder] Fix unexpected duplicate sub path related AppendIterator issue
  Added type of return value in VoterInterface.
  Fixed two bugs in HttpCache

Conflicts:
	src/Symfony/Component/Finder/Tests/FinderTest.php
[HttpFoundation] fixed issue with session_regenerate_id (closes #7380)
Merge branch '2.2' into 2.3

* 2.2:
  [Form] fixed INF usage which does not work on Solaris (closes #8246)
  Fix grammar
  bumped Symfony version to 2.2.4
  updated VERSION for 2.2.3
  update CONTRIBUTORS for 2.2.3
  updated CHANGELOG for 2.2.3
  [Process] Disable exception on stream_select timeout
  [HttpFoundation] fixed issue with session_regenerate_id (closes #7380)
  [DomCrawler] added a note about the default charset
  [Console] fixed regression when calling a command foo:bar if there is another one like foo:bar:baz (closes #8245)
  force the Content-Type to html in the web profiler controllers

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php