fix(git): fix `gbda` alias when there are no merged branches (#10005)

plugins/git/README.md

@@ -23,7 +23,7 @@ plugins=(... git)
 | gb                   | git branch                                                                                                                       |
 | gba                  | git branch -a                                                                                                                    |
 | gbd                  | git branch -d                                                                                                                    |
-| gbda                 | git branch --no-color --merged \| command grep -vE "^(\+\|\*\|\s*($(git_main_branch)\|$(git_develop_branch))\s*$)" \| command xargs -n 1 git branch -d |
+| gbda                 | git branch --no-color --merged \| grep -vE "^([+*]\|\s*($(git_main_branch)\|$(git_develop_branch))\s*$)" \| xargs git branch -d 2>/dev/null |
 | gbD                  | git branch -D                                                                                                                    |
 | gbl                  | git blame -b -w                                                                                                                  |
 | gbnm                 | git branch --no-merged                                                                                                           |

plugins/git/git.plugin.zsh

@@ -73,7 +73,7 @@ alias gapt='git apply --3way'
 alias gb='git branch'
 alias gba='git branch -a'
 alias gbd='git branch -d'
-alias gbda='git branch --no-color --merged | command grep -vE "^(\+|\*|\s*($(git_main_branch)|$(git_develop_branch))\s*$)" | command xargs -n 1 git branch -d'
+alias gbda='git branch --no-color --merged | command grep -vE "^([+*]|\s*($(git_main_branch)|$(git_develop_branch))\s*$)" | command xargs git branch -d 2>/dev/null'
 alias gbD='git branch -D'
 alias gbl='git blame -b -w'
 alias gbnm='git branch --no-merged'