How to remove next line or new line char from last character onwards in any text string

This does require an Appian developed plugin ( [mention:5249ebce040e4a53a9c2d98862b7c1d4:f7d226abd59f475c9d224a79e3f0ec07]) but is the quickest way I can think of. It just says replace any new line or carriage return at the end of an input and replace it with nothing.

a!localVariables(
  local!input: " Need modification.

Remove last line

",
  regexreplaceall(
    "(\r|\n){1,}$",
    local!input,
    ""
  )
)

The regular expression "(\r|\n){1,}$" means:

• (\r|\n) means carriage return or new line
• {1,} is 1 to any number of what preceded it (so any number of new lines or carriage returns)
• $ means the end of a line

Split the string by line breaks, then reassemble the string ignoring empty items.

a!localVariables(
  local!input: " Need modification.

Remove last line

",
 joinarray(split(local!input, char(10)), char(10))
)

I tried to post an answer much like Stefan's last night, but an error prevented me from submitting...  and still prevents me from submitting one with my actual code included :-/