liquibase-core/src/main/java/liquibase/util/StringUtil.java
public static String leftPad(String value, int length) {
        value = StringUtil.trimToEmpty(value);
        if (value.length() >= length) {
            return value;
        }

        return StringUtil.repeat(" ", length - value.length()) + value;
    }
public static String leftPad(String value, int length) {
        value = StringUtil.trimToEmpty(value);
        if (value.length() >= length) {
            return value;
        }

        return StringUtil.repeat(" ", length - value.length()) + value;
    }
Adds spaces to the left of the input value until the string has reached the given length. Nothing is done
if the string already has the given length or if the string is even longer.
@param value The string to pad (if necessary)
@param length the desired length
@return the input string, padded if necessary.