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vim-patch:187df69: runtime(doc): cross-link :| meaning :p and explain E749 (#33559)

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E749 is given when :print (with any range) is issued on an empty buffer,
like the one you get with :new or :enew. Furthermore, due to Vi
compatibility :| is a synonym.

As a result, mappings intended to include a <bar> separator (esp. in the
case of boolean or "||") between commands can generate E749 on startup
when placed in a vimrc if the bars are not properly encoded or escaped.
[1]. Document this failure mode and synonym near the generated error,
and cross link with :help :bar. Note that one must read or scroll quite
a bit to find the mention of :| behaving like :print!

[1]: https://vi.stackexchange.com/q/46625/10604

closes: vim/vim#17173

187df69fd1

Co-authored-by: D. Ben Knoble <ben.knoble+github@gmail.com>
This commit is contained in:
zeertzjq
2025-04-21 16:56:05 +08:00
committed by GitHub
parent 4b02d1f6f6
commit 351613bc1f
1 changed files with 3 additions and 1 deletions
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runtime/doc/various.txt
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@@ -111,7 +111,9 @@ gx Opens the current filepath or URL (decided by
*:p* *:pr* *:print* *E749*
:[range]p[rint] [flags]
Print [range] lines (default current line).
Print [range] lines (default current line). Can also
be spelled `:[range]|` due to Vi compatibility (see
|:bar|). Gives an error in an empty buffer.
In the GUI you can use the File.Print menu entry.
See |ex-flags| for [flags].
The |:filter| command can be used to only show lines