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-rw-r--r--lib/bundler/man/gemfile.5.ronn5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/bundler/man/gemfile.5.ronn b/lib/bundler/man/gemfile.5.ronn
index 69a26b7685..39cd18d551 100644
--- a/lib/bundler/man/gemfile.5.ronn
+++ b/lib/bundler/man/gemfile.5.ronn
@@ -69,6 +69,11 @@ should be the Ruby version that the engine is compatible with.
ruby "3.1.2"
+If you wish to derive your Ruby version from a version file (ie .ruby-version),
+you can use the `file` option instead.
+
+ ruby file: ".ruby-version"
+
### ENGINE
Each application _may_ specify a Ruby engine. If an engine is specified, an