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

Question

We have test like below 
 
 " Need modification. 
 Remove last line 
 " 
 
 In this example, we just need to remove next line char after remove last line string. We still need to keep next line after Need modification. 
 
 We are generating some documents and formatting should not change if users has entered next line in between the lines but only last line should be removed as soon as Users entered Save. 
 
 trim will not work here as it will remove from all the text

Stefan Helzle · Answer

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))
)

Andrew Hickingbotham · Answer

This does require an Appian developed plugin ( Regular Expression Functions ) 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(
 "(|
){1,}$",
 local!input,
 ""
 )
) 
 The regular expression "(|
){1,}$" means: 
 
 (|
) 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

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

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