fix(bundler): keep bu as generic update alias

plugins/bundler/README.md

@@ -22,7 +22,7 @@ plugins=(... bundler)
 | `bo`   | `bundle open`     | Opens the source directory for a gem in your bundle      |
 | `bout` | `bundle outdated` | List installed gems with newer versions available        |
 | `bp`   | `bundle package`  | Package your needed .gem files into your application     |
-| `bu`   | `bundle update --all` (no arguments) or `bundle update <args>` | Update all gems, or only the given gems/options (e.g. `bu rake`, `bu --ruby`) |
+| `bu`   | `bundle update`   | Update your gems to the latest available versions          |
 
 ## Gem wrapper
 

plugins/bundler/bundler.plugin.zsh

@@ -9,16 +9,7 @@ alias bl="bundle list"
 alias bo="bundle open"
 alias bout="bundle outdated"
 alias bp="bundle package"
-unalias bu 2>/dev/null
-# `bundle update` needs --all to update everything, but rejects --all when
-# gems or options are given (e.g. `bu <gem>`, `bu --ruby`)
-bu() {
-  if [[ $# -eq 0 ]]; then
-    bundle update --all
-  else
-    bundle update "$@"
-  fi
-}
+alias bu="bundle update"
 
 ## Gem wrapper