git apply -3 doesn't work

[Konstantin Kharlamov <hi-angel@yandex.ru>]

As description says. To check that the 3-way merge should actually work subsitute `git apply -3` with `git am -3` in the following steps. This way it works.

# Steps to reproduce

     $ git init
     Initialized empty Git repository in /tmp/foo/.git/
     $ echo hello > file1 && git add file1 && git commit -m "initial commit"
     [master (root-commit) 8334093] initial commit
      1 file changed, 1 insertion(+)
      create mode 100644 file1
     $ git checkout -b mybranch
     Switched to a new branch 'mybranch'
     $ echo bye > file1 && git add file1 && git commit -m "change file1 text"
     [mybranch 1807900] change file1 text
      1 file changed, 1 insertion(+), 1 deletion(-)
     $ git format-patch -1 --stdout > 1.patch
     $ git checkout master
     Switched to branch 'master'
     $ mv file1 file2
     $ git add -u && git add file2 && git commit -m "renamed file1 to file2"
     $ git apply -3 1.patch
     error: file1: does not exist in index

## Expected

Git apply successfully returns

## Actual

It prints

	error: file1: does not exist in index

# Versions

git 2.26.2