It seems subr-x's string-trim-right only operates on the last line.
How to strip trailing spaces on all lines in a variable?
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ITYM it operates on a string, not lines inside a string. By that definition it does indeed "trim whitespace from the end of a multi-line string". I'd be surprised if it trimmed it in the middle of it, just because there happened to be a newline at that place.– wasamasaCommented Jul 29, 2017 at 19:59
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1 Answer
This can be done by splitting and joining strings:
(require 'subr-x)
(defun string-trim-right-multiline (str)
(mapconcat 'string-trim-right
(split-string str "\n") "\n"))
Note that if you want to perform other operations on the string you can define a function:
(require 'subr-x)
(defun string-trim-right-multiline (str)
(mapconcat (function (lambda (s) (string-trim-right s)))
(split-string str "\n") "\n"))
answered Jul 29, 2017 at 20:48
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1You can replace
(function (lambda (s) (string-trim-right s)))with just'string-trim-right.– wvxvwCommented Jul 30, 2017 at 6:00 -
Done, but included previous since it can be handy to make other edits. Commented Jul 30, 2017 at 13:58