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-rw-r--r--lib/rdoc/options.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rdoc/options.rb b/lib/rdoc/options.rb
index e4616f2aed8..f67241bc038 100644
--- a/lib/rdoc/options.rb
+++ b/lib/rdoc/options.rb
@@ -193,7 +193,7 @@ Usage: #{opt.program_name} [options] [names...]
opt.separator nil
- opt.on("--force-update", "-U",
+ opt.on("--[no-]force-update", "-U",
"Forces rdoc to scan all sources even if",
"newer than the flag file.") do |value|
@force_update = value