### Bug Description I attempted to use the command charmcraft help --all | grep revision to filter the output and specifically retrieve information related to revisions. However, the command did not function as expected. Instead of filtering the output to display only lines containing the term "revision," the entire printout was shown without any filtration. Further investigation revealed that the issue stems from the output redirection. It appears that the information I intended to filter is being sent to the stderr rather than the stdout, causing the grep command to be ineffective in filtering the output. ### To Reproduce charmcraft help --all | grep revision ### Environment Ubuntu 22.04 LTS Charmcraft 2.5.2 ### charmcraft.yaml ```shell - ``` ### Relevant log output ```shell charmcraft help --all|grep revision Usage: charmcraft [help] <command> Summary: Charmcraft helps build, package and publish operators on Charmhub. Together with the Python Operator Framework, charmcraft simplifies operator development and collaboration. See https://charmhub.io/publishing for more information. Global options: -h, --help: Show this help message and exit -v, --verbose: Show debug information and be more verbose -q, --quiet: Only show warnings and errors, not progress --verbosity: Set the verbosity level to 'quiet', 'brief', 'verbose', 'debug' or 'trace' -p, --project-dir: Specify the project's directory (defaults to current) Commands can be classified as follows: Basic: analyze: Analyze a charm clean: Purge project artifacts pack: Build the charm or bundle init: Initialize a charm operator package tree and files version: Show charmcraft version Charmhub: login: Login to Charmhub logout: Logout from Charmhub and remove token whoami: Show your Charmhub login status register: Register a charm name in Charmhub register-bundle: Register a bundle name in the Store unregister: Unregister a name in the Store names: List your registered charm and bundle names in Charmhub upload: Upload a charm or bundle to Charmhub revisions: List revisions for a charm or a bundle in Charmhub release: Release a charm or bundle revision in one or more channels promote-bundle: Promote a bundle to another channel in the Store status: Show channel and released revisions close: Close a channel for a charm or bundle create-lib: Create a charm library publish-lib: Publish one or more charm libraries list-lib: List all libraries from a charm fetch-lib: Fetch one or more charm libraries resources: List the resources associated with a given charm in Charmhub upload-resource: Upload a resource to Charmhub resource-revisions: List revisions for a resource associated to a charm in Charmhub Extensions: list-extensions: List available extensions for all supported bases expand-extensions: Expand extensions in charmcraft.yaml For more information about a specific command, run 'charmcraft help <command>'. ```