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    <p>This is interesting. The distinguishing characteristic of CTRL-R CTRL-P (insert literally and fix indent) is not used; indent is not involved, and the literal insert also happens with CTRL-R CTRL-R (but that doesn't work, nor are any special chars like <code>&lt;BS&gt;</code> involved here).</p> <p>Instead of CTRL-R CTRL-P, this also works with CTRL-R CTRL-O; the only commonality (in the help) is that both have:</p> <blockquote> <p>Does not replace characters!</p> </blockquote> <p>How this relates to repeat via <code>.</code>, I don't know (you'd have to dig through the source code or ask on the <a href="http://www.vim.org/community.php" rel="nofollow">vim_dev mailing list</a>). Basically, it causes the <code>&lt;C-R&gt;&lt;C-O&gt;</code> command itself to go into the <code>.</code> register, instead of the literal text which was in the register when you gave the command. This means that when you repeat the operation with <code>.</code>, you'll get whatever's in the specified register at the time of the repeat, instead of just inserting the same literal text again.</p> <p>This turns Vim from repeating the command as</p> <p><em>replace the current word with <code>(</code>, followed by <code>one</code>, followed by <code>)</code></em><br> to<br> <em>replace the current word with <code>(</code>, insert the register contents of the default register, insert <code>)</code></em>.</p> <p>I.e. the first repeat stores the <em>result</em> of the register insertion, whereas the second actually memorizes the <em>action</em> of the register insertion.</p> <p>You'll see the effect when you list the <code>".</code> register contents via <code>:reg .</code>, too.</p>
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    1. POIn vim, what is the difference between <c-r>+register and <c-r><c-p>+register with the . command?
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    1. USIngo Karkat
    1. USIngo Karkat
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    1. COAnd actually the designer of this solution explained it there http://vimgolf.com/challenges/5192f96ad8df110002000002#51941eeed8df110002000056 I think you can include this explanation on your answer and I will choose it (cause it is good).
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    2. COThat comment apparently is only visible for registered users: _Unlock 585 remaining solutions by signing in and submitting your own entry_
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      1. USIngo Karkat
    3. COIndeed. Basically, @udioica says : "Basically, it causes the '<C-R><C-O>' command itself to go into the '.' register, instead of the literal text which was in the register when you gave the command. This means that when you repeat the operation with '.', you'll get whatever's in the specified register at the time of the repeat, instead of just inserting the same literal text again. Try 'cw(<C-R>")<Esc>:reg<CR>' and compare the value of the '.' register to that from 'cw(<C-R><C-O>")<Esc>:reg<CR>' For the official documentation, check ':help i_Ctrl-R_Ctrl-O<CR>'" EDIT: then the doc makes sense.
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