📝 Remove a trailing ,

Because of a syntax error. Missed in 4ee58e7.

Author: tikkss

README.ja.md

@@ -81,7 +81,7 @@ gem 'red-arrow-numo-narray'    # 必要に応じて。Numo::NArray との連携
 gem 'red-parquet', '>= 12.0.0' # 必要に応じて。Parquetの入出力が必要な場合。
 gem 'red-datasets-arrow'       # 必要に応じて。Red Datasets を利用する場合。
 gem 'red-arrow-activerecord'   # 必要に応じて。Active Record とのデータ交換が必要な場合。
-gem 'rover-df',                # 必要に応じて。Rover::DataFrameに対する入出力が必要な場合。
+gem 'rover-df'                 # 必要に応じて。Rover::DataFrameに対する入出力が必要な場合。
 ```
 
 `bundle install`とするか、または `gem install red_amber`としてインストールしてください。

README.md

@@ -82,7 +82,7 @@ gem 'red-arrow-numo-narray'    # Optional, recommended if you use inputs from Nu
 gem 'red-parquet', '>= 12.0.0' # Optional, if you use IO from/to parquet
 gem 'red-datasets-arrow'       # Optional, recommended if you use Red Datasets
 gem 'red-arrow-activerecord'   # Optional, if you use Active Record
-gem 'rover-df',                # Optional, if you use IO from/to Rover::DataFrame.
+gem 'rover-df'                 # Optional, if you use IO from/to Rover::DataFrame.
 ```
 
 And then execute `bundle install` or install them yourself such as `gem install red_amber`.

doc/qmd/examples_of_red_amber.qmd

@@ -63,7 +63,7 @@ gem 'red-arrow-numo-narray'    # Optional, recommended if you use inputs from Nu
 gem 'red-parquet', '>= 12.0.0' # Optional, if you use IO from/to parquet
 gem 'red-datasets-arrow'       # Optional, recommended if you use Red Datasets
 gem 'red-arrow-activerecord'   # Optional, if you use Active Record
-gem 'rover-df',                # Optional, if you use IO from/to Rover::DataFrame.
+gem 'rover-df'                 # Optional, if you use IO from/to Rover::DataFrame.
 ```
 
 And then execute `bundle install` or install it yourself as `gem install red_amber`.