fix(gentoo): fix tab color completion (#9810)

This commit fixes an issue in the gentoo theme introduced in 3bb5e977.
Due to incorrect line width calculations, colors are incorrectly applied
when using tab.

Fixes #9778

Signed-off-by: Thomas De Backer <mosterdt@debacker.me>

plugins/rails/README.md

@@ -21,6 +21,8 @@ plugins=(... rails)
 | `rgen`| `rails generate`           | Generate boilerplate code                          |
 | `rgm` | `rails generate migration` | Generate a db migration                            |
 | `rp`  | `rails plugin`             | Run a Rails plugin command                         |
+| `rr`  | `rails routes`             | List all defined routes                            |
+| `rrg` | `rails routes \| grep`     | List and filter the defined routes                 |
 | `ru`  | `rails runner`             | Run Ruby code in the context of Rails              |
 | `rs`  | `rails server`             | Launch a web server                                |
 | `rsd` | `rails server --debugger`  | Launch a web server with debugger                  |
@@ -43,8 +45,6 @@ plugins=(... rails)
 | `rdsl`  | `rake db:schema:load`           | Load the database schema                               |
 | `rlc`   | `rake log:clear`                | Clear Rails logs                                       |
 | `rn`    | `rake notes`                    | Search for notes (`FIXME`, `TODO`) in code comments    |
-| `rr`    | `rake routes`                   | List all defined routes                                |
-| `rrg`   | `rake routes \| grep`           | List and filter the defined routes                     |
 | `rt`    | `rake test`                     | Run Rails tests                                        |
 | `rmd`   | `rake middleware`               | Interact with Rails middlewares                        |
 | `rsts`  | `rake stats`                    | Print code statistics                                  |

themes/gentoo.zsh-theme

@@ -25,4 +25,4 @@ gentoo_precmd() {
 autoload -U add-zsh-hook
 add-zsh-hook precmd gentoo_precmd
 
-PROMPT='%(!.%B%F{red}.%B%F{green}%n@)%m %F{blue}%(!.%1~.%~) ${vcs_info_msg_0_}%(!.#.$)%{$reset_color%} '
+PROMPT='%(!.%B%F{red}.%B%F{green}%n@)%m %F{blue}%(!.%1~.%~) ${vcs_info_msg_0_}%(!.#.$)%k%b%f '