Why can't I merge a source code branch into the master branch

When I try to merge it fails, see screen image for error :



I have a .gitignore see below :


# Xcode

.DS_Store

*/build/

*.pbxuser

!default.pbxuser

*.mode1v3

!default.mode1v3

*.mode2v3

!default.mode2v3

*.perspectivev3

!default.perspectivev3

xcuserdata

profile

*.moved-aside

DerivedData

.idea/

*.hmap


My gitignore was called default.gitignore then I changed it to .gitignore, neither changed the outcome.


Any suggestions much appreciated.


Many thanks,

Guy

Why can't I merge a source code branch into the master branch
 
 
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