Restoring iTerm2 settings form a backup of com.googlecode.iterm2.plist file

• iTerm2 version: 3.1.7

• OS version: 10.11.6

Detailed steps to reproduce the problem:

1. Install iTerm2
2. Open iTerm2 (so ~/Library/Preferences/com.googlecode.iterm2.plist is created)
3. Close iTerm2
4. Replace ~/Library/Preferences/com.googlecode.iterm2.plist with backed up version of same file
5. Start iTerm2
6. Settings are not restored, they have been overwritten

What happened:

~/Library/Preferences $ ls -l | grep iterm
-rw-------   1 marksmith  staff  1888373  4 Aug 14:41 com.googlecode.iterm2.plist
-rw-------   1 marksmith  staff     6136  4 Aug 14:04 com.googlecode.iterm2.plist.orig
~/Library/Preferences $ defaults read com.googlecode.iterm2
2019-08-04 14:41:32.042 defaults[6999:135247] 
Domain /Users/marksmith/Library/Preferences/com.googlecode.iterm2 does not exist

After starting iTerm2:

~/Library/Preferences $ ls -l | grep iterm
-rw-------   1 marksmith  staff   5553  4 Aug 14:43 com.googlecode.iterm2.plist
-rw-------   1 marksmith  staff   6136  4 Aug 14:04 com.googlecode.iterm2.plist.orig

What should have happened:

Settings should be restored to iTerm2 rather than being overwritten