e446. removing line termination characters from a string.txt

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A line termination character sequence is a character or character pair from the set: \n, \r, \r\n, \u0085, \u2028, and \u2029. 
Note: The character pair \n\r is considered a two-line terminator character and therefore will be replaced with two spaces. 

    // Returns a version of the input where all line terminators
    // are replaced with a space.
    public static CharSequence removeLineTerminators(CharSequence inputStr) {
        String patternStr = "(?m)$^|[\\r\\n]+\\z";
        String replaceStr = " ";
        Pattern pattern = Pattern.compile(patternStr);
        Matcher matcher = pattern.matcher(inputStr);
        return matcher.replaceAll(replaceStr);
    }

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