runnableExamples: \r renders as \c

[timotheecour]

runnableExamples: \r renders as \c

proc removePrefix*(s: var string, chars: set[char] = Newlines) {.
  rtl, extern: "nsuRemovePrefixCharSet".} =
  ## Removes all characters from `chars` from the start of the string `s`
  ## (in-place).
  ##
  runnableExamples:
     var userInput = "\r\n*~Hello World!"

shows as:

/Users/timothee/.cache/nim/strutils_d/runnableExamples/strutils_examples13.nim

import
  "/Users/timothee/git_clone/nim/Nim/lib/pure/strutils.nim"

block:
  var userInput = "\c\n*~Hello World!"
  userInput.removePrefix

likewise in rendered html page, but that's a consequence of above: it renders as var userInput = "\c\n*~Hello World!"

[Araq]

That's ok.

[timotheecour]

fixed by #14439