update documentation

NEWS.org

@@ -18,7 +18,6 @@
       After upgrading, you may wish to delete the files in the old location to
       recover some diskspace.
 
-
     - There's a new subcommand ~mu init~ to initialize the mu database, which
       takes the ~--maildir~ and ~--my-address~ parameters that ~index~ used to take.
       These parameters are persistent so ~index~ does not need (or accept) them
@@ -34,14 +33,15 @@
       contact-completion) is now stored as part of the Xapian database rather
       than as a separate file.
 
-    - The ~--xbatchsize~ and ~--autoupgrade~ options for indexing are gone now; both
-      are determined implicitly now.
+    - The ~--xbatchsize~ and ~--autoupgrade~ options for indexing are gone; both are
+      determined implicitly now.
 
 *** mu4e
 
     - ~mu4e~ no longer uses the ~mu4e-maildir~ and ~mu4e-user-mail-address-list~
       variables; instead it uses the information it gets from ~mu~ (see the ~mu~
-      section above).
+      section above). If you have a non-default ~mu4e-mu-home~, make sure to set
+      it before ~mu4e~ starts.
 
       It is strongly recommended that you run ~mu init~ with the appropriate
       parameters to (re)initialize the Xapian database, as mentioned in the

mu4e/mu4e.texi

@@ -2013,6 +2013,12 @@ only appear as the term's rightmost character:
 mime:image/*
 @end verbatim
 
+Get all messages with files that end in @t{.ppt}; this uses the
+regular-expression support, which is powerful but relatively slow:
+@verbatim
+file:/\.ppt$/
+@end verbatim
+
 @end itemize
 
 @node Bookmarks