akes a percentage between 0 (disabled) and 100 (files must
be identical) as its parameter. With a parameter greater than 0,
this compares every removed file with every added file and records
those similar enough as renames. Detecting renamed files this way
can be expensive. After using this option, :hg:`status -C` can be
used to check which files were identified as moved or renamed. If
not specified, -s/--similarity defaults to 100 and only renames of
identical files are detected.

.. container:: verbose

   Examples:

     - A number of files (bar.c and foo.c) are new,
       while foobar.c has been removed (without using :hg:`remove`)
       from the repository::

         $ ls
         bar.c foo.c
         $ hg status
         ! foobar.c
         ? bar.c
         ? foo.c
         $ hg addremove
         adding bar.c
         adding foo.c
         removing foobar.c
         $ hg status
         A bar.c
         A foo.c
         R foobar.c

     - A file foobar.c was moved to foo.c without using :hg:`rename`.
       Afterwards, it was edited slightly::

         $ ls
         foo.c
         $ hg status
         ! foobar.c
         ? foo.c
         $ hg addremove --similarity 90
         removing foobar.c
         adding foo.c
         recording removal of foobar.c as rename to foo.c (94% similar)
         $ hg status -C
         A foo.c
           foobar.c
         R foobar.c

Returns 0 if all files are successfully added.
s