(vc-annotate-revision-previous-to-line): Really use previous revision.
treec450f334c8c2fb7548a26f3ef4f2440b49f52260
-rw-r--r-- 210 .arch-inventory
-rw-r--r-- 375 .dir-locals.el
-rw-r--r-- 96 .gitignore
-rw-r--r-- 1044 BUGS
-rw-r--r-- 35147 COPYING
-rw-r--r-- 238704 ChangeLog
-rw-r--r-- 36523 INSTALL
-rw-r--r-- 4037 INSTALL.CVS
-rw-r--r-- 34029 Makefile.in
-rw-r--r-- 5404 README
drwxr-xr-x - admin
-rwxr-xr-x 274 autogen.sh
-rw-r--r-- 11133 config.bat
-rwxr-xr-x 44702 config.guess
-rwxr-xr-x 34334 config.sub
-rwxr-xr-x 773504 configure
-rw-r--r-- 103613 configure.in
drwxr-xr-x - doc
drwxr-xr-x - etc
drwxr-xr-x - info
-rwxr-xr-x 5577 install-sh
drwxr-xr-x - leim
drwxr-xr-x - lib-src
drwxr-xr-x - lisp
drwxr-xr-x - lwlib
drwxr-xr-x - m4
-rwxr-xr-x 25719 make-dist
-rwxr-xr-x 3277 mkinstalldirs
-rwxr-xr-x 129 move-if-change
drwxr-xr-x - msdos
drwxr-xr-x - nextstep
drwxr-xr-x - nt
drwxr-xr-x - oldXMenu
drwxr-xr-x - src
drwxr-xr-x - test
-rwxr-xr-x 1715 update-subdirs
-rw-r--r-- 269 vpath.sed