typo

Signed-off-by: Mattias Andrée <maandree@operamail.com>
typo + commit squashing

Signed-off-by: Mattias Andrée <maandree@operamail.com>
warn agaist squashing non-tips

Signed-off-by: Mattias Andrée <maandree@operamail.com>
m

Signed-off-by: Mattias Andrée <maandree@operamail.com>
explain why you should not squash non-tips

Signed-off-by: Mattias Andrée <maandree@operamail.com>
warn against squashing non-feature branches, for example the master branch

Signed-off-by: Mattias Andrée <maandree@operamail.com>