docs: Improve docs on changing copier answers (#143)

Author: delsner

README.md

@@ -12,8 +12,14 @@ pixi exec --spec copier --spec ruamel.yaml -- copier copy --trust https://github
 To update to a newer template version:
 
 ```bash
-pixi exec --spec copier --spec ruamel.yaml -- copier update --defaults --trust
+pixi exec --spec copier --spec ruamel.yaml -- copier update --defaults --trust .
 ```
 
 Note that copier will show `Conflict` for files that have manual changes.
 This is normal. As long as there are no merge conflict markers in the files all patches applied cleanly.
+
+If you want to change any answer that you gave before, run:
+
+```bash
+pixi exec --spec copier --spec ruamel.yaml -- copier update --trust --defaults --vcs-ref=:current: --data answer_name=answer_value .
+```

template/{{ _copier_conf.answers_file }}.jinja

@@ -1,2 +1,11 @@
 # This file is managed by Copier; DO NOT EDIT OR REMOVE.
+#
+# If you want to change any of the copier answers, run one of the following:
+# 1. If you want to answer _all_ questions again:
+#   `copier update --trust --vcs-ref=:current: .`
+# 2. If you want to answer a _specific_ question again:
+#   `copier update --trust --defaults --vcs-ref=:current: --data answer_name=answer_value .`
+#
+# If you want to run this as a one-off command, prefix with:
+#   `pixi exec --spec copier --spec ruamel.yaml -- {command}`
 {{ _copier_answers|to_nice_yaml -}}