NEWS: fix some old typos and trailing whitespace

(with a further M-x whitespace-cleanup by db)

NEWS

@@ -202,7 +202,7 @@ Sebastian Spaeth contributed two changes related to unicode and UTF8:
   * message tags are now explicitly unicode
   * query string is encoded as a UTF8 byte string
 
-Build-System improvments
+Build-System improvements
 ------------------------
 
 Generate notmuch.sym after the relevant object files
@@ -236,8 +236,8 @@ Folder-based searching
   For example, one might use things such as:
 
 	folder:spam
-        folder:2011-*
-        folder:work/todo
+	folder:2011-*
+	folder:work/todo
 
   to match any path containing a directory "spam", "work/todo", or
   containing a directory starting with "2011-", respectively.
@@ -448,7 +448,7 @@ Ruby bindings are now much more complete
   Including QUERY.sort, QUERY.to_s, MESSAGE.maildir_flags_to_tags,
   MESSAGE.tags_to_maildir_flags, and MESSAGE.get_filenames
 
-* Python bindings have been upodated and extended
+* Python bindings have been updated and extended
   (docs online at http://packages.python.org/notmuch/)
 
   New bindings:
@@ -458,16 +458,16 @@ Ruby bindings are now much more complete
 
   - Message().__cmp__() and __hash__()
   These allow, for example:
-        if msg1 == msg2: ...
+	if msg1 == msg2: ...
 
   As well as set arithmetic on Messages():
 
-        s1, s2= set(msgs1), set(msgs2)
+	s1, s2= set(msgs1), set(msgs2)
 	s1.union(s2)
 	s2 -= s1
 
    Removed:
-     - len(Messages()) as it exausted the iterator.
+     - len(Messages()) as it exhausted the iterator.
        Use len(list(Messages())) or
        Query.count_messages() to get the length.
 
@@ -603,9 +603,9 @@ Maildir-flag synchronization
 	----     -----
 	'D'      draft
 	'F'      flagged
-        'P'      passed
-        'R'      replied
-        'S'      unread (added when 'S' flag is not present)
+	'P'      passed
+	'R'      replied
+	'S'      unread (added when 'S' flag is not present)
 
   The synchronization occurs in both directions, (for example, adding
   the 'S' flag to a file will cause the "unread" tag to be added, and
@@ -1359,4 +1359,3 @@ a performance bug that made notmuch very slow when modifying
 tags. This would cause distracting pauses when reading mail while
 notmuch would wait for Xapian when removing the "inbox" and "unread"
 tags from messages in a thread.
-