whitespace fix for usage message

[Ulrich Mueller]

The usage message was untabified some time ago (see ChangeLog entry
of 2004-02-21), but now two lines contain TABs again.

--- emacs-orig/src/emacs.c      2008-10-31 16:55:56.000000000 +0100
+++ emacs/src/emacs.c   2008-10-31 17:00:11.000000000 +0100
@@ -285,8 +285,8 @@
 Action options:\n\
 \n\
 FILE                    visit FILE using find-file\n\
-+LINE                  go to line LINE in next FILE\n\
-+LINE:COLUMN           go to line LINE, column COLUMN, in next FILE\n\
++LINE                   go to line LINE in next FILE\n\
++LINE:COLUMN            go to line LINE, column COLUMN, in next FILE\n\
 --directory, -L DIR     add DIR to variable load-path\n\
 --eval EXPR             evaluate Emacs Lisp expression EXPR\n\
 --execute EXPR          evaluate Emacs Lisp expression EXPR\n\