Why is \r a newline for Vim?
From question How to replace a character for a newline in Vim?. You have to use r when replacing text for a newline, like this
:%s/%/r/g
But when replacing end of lines and newlines for a character, you can do it like:
:%s/n/%/g
What section of the manual documents these behaviors, and what's the reasoning behind them?
From vim docs on patterns:
r matches <CR>
n matches an end-of-line - When matching in a string instead of buffer text a literal newline character is matched.
From http://vim.wikia.com/wiki/Search_and_replace :
When Searching
...
n is newline, r is CR (carriage return = Ctrl-M = ^M )
When Replacing
...
r is newline, n is a null byte ( 0x00 ).
Another aspect to this is that , which is traditionally NULL, is taken in s// / to mean "the whole matched pattern". (Which, by the way, is redundant with, and longer than, & ).
to mean NULL , so you use n n to mean n , so you use r . r to mean r , but I don't know who would want to add that char on purpose. —☈
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