git plugin: remove `format:' from --pretty flag

Changes gke, glol and glola aliases.

Fixes #5362

plugins/git/git.plugin.zsh

@@ -161,7 +161,7 @@ compdef git-svn-dcommit-push=git
 
 alias gk='\gitk --all --branches'
 compdef _git gk='gitk'
-alias gke='\gitk --all $(git log -g --pretty=format:%h)'
+alias gke='\gitk --all $(git log -g --pretty=%h)'
 compdef _git gke='gitk'
 
 alias gl='git pull'
@@ -171,8 +171,8 @@ alias glgg='git log --graph'
 alias glgga='git log --graph --decorate --all'
 alias glgm='git log --graph --max-count=10'
 alias glo='git log --oneline --decorate'
-alias glol="git log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit"
-alias glola="git log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --all"
+alias glol="git log --graph --pretty='%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit"
+alias glola="git log --graph --pretty='%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --all"
 alias glog='git log --oneline --decorate --graph'
 alias gloga='git log --oneline --decorate --graph --all'
 alias glp="_git_log_prettily"