Simplify gemrc nodoc

Per https://stackoverflow.com/questions/1381725/how-to-make-no-ri-no-rdoc-the-default-for-gem-install#comment22636260_7662245 this is possible since rubygems 2.0.0 from 2012. I updated the comment to indicate this is only for the `gem` command, bundler already doesn't do this by default. It works: ``` $ gem install rubocop -v 1.69.0 Fetching rubocop-1.69.0.gem Successfully installed rubocop-1.69.0 1 gem installed $ gem update rubocop Updating installed gems Updating rubocop Fetching rubocop-1.69.1.gem Successfully installed rubocop-1.69.1 Gems updated: rubocop ```
docker-library · Dec 6, 2024 · 7806540 · 7806540
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diff --git a/3.1/alpine3.20/Dockerfile b/3.1/alpine3.20/Dockerfile
diff --git a/3.1/alpine3.21/Dockerfile b/3.1/alpine3.21/Dockerfile
diff --git a/3.1/bookworm/Dockerfile b/3.1/bookworm/Dockerfile
diff --git a/3.1/bullseye/Dockerfile b/3.1/bullseye/Dockerfile
diff --git a/3.1/slim-bookworm/Dockerfile b/3.1/slim-bookworm/Dockerfile
diff --git a/3.1/slim-bullseye/Dockerfile b/3.1/slim-bullseye/Dockerfile
diff --git a/3.2/alpine3.20/Dockerfile b/3.2/alpine3.20/Dockerfile
diff --git a/3.2/alpine3.21/Dockerfile b/3.2/alpine3.21/Dockerfile
diff --git a/3.2/bookworm/Dockerfile b/3.2/bookworm/Dockerfile
diff --git a/3.2/bullseye/Dockerfile b/3.2/bullseye/Dockerfile
diff --git a/3.2/slim-bookworm/Dockerfile b/3.2/slim-bookworm/Dockerfile
diff --git a/3.2/slim-bullseye/Dockerfile b/3.2/slim-bullseye/Dockerfile
diff --git a/3.3/alpine3.20/Dockerfile b/3.3/alpine3.20/Dockerfile
diff --git a/3.3/alpine3.21/Dockerfile b/3.3/alpine3.21/Dockerfile
diff --git a/3.3/bookworm/Dockerfile b/3.3/bookworm/Dockerfile
diff --git a/3.3/bullseye/Dockerfile b/3.3/bullseye/Dockerfile
diff --git a/3.3/slim-bookworm/Dockerfile b/3.3/slim-bookworm/Dockerfile
diff --git a/3.3/slim-bullseye/Dockerfile b/3.3/slim-bullseye/Dockerfile
diff --git a/3.4-rc/alpine3.20/Dockerfile b/3.4-rc/alpine3.20/Dockerfile
diff --git a/3.4-rc/alpine3.21/Dockerfile b/3.4-rc/alpine3.21/Dockerfile
diff --git a/3.4-rc/bookworm/Dockerfile b/3.4-rc/bookworm/Dockerfile
diff --git a/3.4-rc/bullseye/Dockerfile b/3.4-rc/bullseye/Dockerfile
diff --git a/3.4-rc/slim-bookworm/Dockerfile b/3.4-rc/slim-bookworm/Dockerfile
diff --git a/3.4-rc/slim-bullseye/Dockerfile b/3.4-rc/slim-bullseye/Dockerfile
diff --git a/Dockerfile.template b/Dockerfile.template
@@ -41,13 +41,10 @@ RUN set -eux; \
 	rm -rf /var/lib/apt/lists/*
 
 {{ ) else "" end -}}
-# skip installing gem documentation
+# skip installing gem documentation with `gem install`/`gem update`
 RUN set -eux; \
 	mkdir -p /usr/local/etc; \
-	{ \
-		echo 'install: --no-document'; \
-		echo 'update: --no-document'; \
-	} >> /usr/local/etc/gemrc
+	echo 'gem: --no-document' >> /usr/local/etc/gemrc
 
 ENV LANG C.UTF-8