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diff --git a/doc/command_injection.rdoc b/doc/command_injection.rdoc
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--- a/doc/command_injection.rdoc
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-= Command Injection
-
-Some Ruby core methods accept string data
-that includes text to be executed as a system command.
-
-They should not be called with unknown or unsanitized commands.
-
-These methods include:
-
-- Kernel.system
-- Kernel.open
-- {\`command` (backtick method)}[rdoc-ref:Kernel#`]
-  (also called by the expression <tt>%x[command]</tt>).
-- IO.popen(command).
-- IO.read(command).
-- IO.write(command).
-- IO.binread(command).
-- IO.binwrite(command).
-- IO.readlines(command).
-- IO.foreach(command).
-- URI.open(command).
-
-Note that some of these methods do not execute commands when called
-from subclass \File:
-
-- File.read(path).
-- File.write(path).
-- File.binread(path).
-- File.binwrite(path).
-- File.readlines(path).
-- File.foreach(path).