Prune trailing whitespaces from code and documentation

They are redundant in all pruned cases and sometimes even create some
problems, e.g., when one tries to jump through paragraphs in vi.

Signed-off-by: Eygene Ryabinkin <rea@codelabs.ru>

docs/doc-src/API.rst

@@ -9,7 +9,7 @@
 
 Within :mod:`offlineimap`, the classes :class:`OfflineImap` provides the high-level functionality. The rest of the classes should usually not needed to be touched by the user. Email repositories are represented by a :class:`offlineimap.repository.Base.BaseRepository` or derivatives (see :mod:`offlineimap.repository` for details). A folder within a repository is represented by a :class:`offlineimap.folder.Base.BaseFolder` or any derivative from :mod:`offlineimap.folder`.
 
-This page contains the main API overview of OfflineImap |release|. 
+This page contains the main API overview of OfflineImap |release|.
 
 OfflineImap can be imported as::
 
@@ -22,7 +22,7 @@ be merged into the main documentation.
 
 :mod:`offlineimap` -- The OfflineImap module
 =============================================
- 
+
 .. module:: offlineimap
 
 .. autoclass:: offlineimap.OfflineImap(cmdline_opts = None)

docs/doc-src/FAQ.rst

@@ -67,13 +67,13 @@ based in instructions submitted by Chris Walker::
 
     First, you must run OfflineIMAP in the Cygwin environment. The Windows
     filesystem is not powerful enough to accomodate Maildir by itself.
-    
+
     Next, you’ll need to mount your Maildir directory in a special
     way. There is information for doing that at
     http://barnson.org/node/295. That site gives this example::
-    
+
       mount -f -s -b -o managed "d:/tmp/mail" "/home/of/mail"
-    
+
     That URL also has more details on making OfflineIMAP work with Windows.
 
 
@@ -383,9 +383,9 @@ you’ll list this::
   [mbnames]
   enabled = yes
   filename = ~/Mutt/muttrc.mailboxes
-  header = "mailboxes " 
-  peritem = "+%(accountname)s/%(foldername)s" 
-  sep = " " 
+  header = "mailboxes "
+  peritem = "+%(accountname)s/%(foldername)s"
+  sep = " "
   footer = "\n"
 
 Then in your ``.muttrc``::
@@ -448,7 +448,7 @@ written in Korn, so you’ll need ksh, pdksh, or mksh to run it::
   # remove any old instances of this shell script or offlineimap
   for pid in $(pgrep offlineimap)
   do
-    if  $pid -ne $$ 
+    if  $pid -ne $$
     then
       kill $pid
     fi

docs/doc-src/HACKING.rst

@@ -440,7 +440,7 @@ Know the status of your patch after submission
   of the branch in which your patch has been merged (i.e. it will not
   tell you if your patch is merged in pu if you rebase on top of
   master).
- 
+
 .. * Read the git mailing list, the maintainer regularly posts messages
   entitled "What's cooking in git.git" and "What's in git.git" giving
   the status of various proposed changes.