Update to inline conditional syntax

plugins/git/git.plugin.zsh

@@ -33,11 +33,6 @@ function work_in_progress() {
   fi
 }
 
-function _omz_git_stash_command() {
-  [[ `git --version 2>/dev/null` =~ '^git version ([[:digit:]]+.[[:digit:]]+)' && "$match[1]" >= '2.13' ]] \
-  && echo push || echo save
-}
-
 #
 # Aliases
 # (sorted alphabetically)
@@ -243,7 +238,12 @@ alias gsps='git show --pretty=short --show-signature'
 alias gsr='git svn rebase'
 alias gss='git status -s'
 alias gst='git status'
-alias gsta="git stash $(_omz_git_stash_command)"
+
+# use the default stash push on git 2.13 and newer
+[[ "$(git --version 2>/dev/null)" =~ '^git version ([0-9]+.[0-9]+)' && "$match" -ge '2.13' ]] \
+  && alias gsta='git stash push'
+  || alias gsta='git stash save'
+
 alias gstaa='git stash apply'
 alias gstc='git stash clear'
 alias gstd='git stash drop'