question: public static String denormalize ( final CharSequence self ) { if ( lineSeparator == null ) { final StringWriter sw = new StringWriter ( 2 ) ; try { final BufferedWriter bw = new BufferedWriter ( sw ) ; bw . newLine ( ) ; bw . flush ( ) ; lineSeparator = sw . toString ( ) ; } catch ( IOException ioe ) { lineSeparator = "\n" ; } } final int len = self . length ( ) ; if ( len < 1 ) { return self . toString ( ) ; } final StringBuilder sb = new StringBuilder ( ( 110 * len ) / 100 ) ; int i = 0 ; CharSequence cs = ( self instanceof GString ) ? self . toString ( ) : self ; while ( i < len ) { final char ch = cs . charAt ( i ++ ) ; switch ( ch ) { case '\r' : sb . append ( lineSeparator ) ; if ( ( i < len ) && ( cs . charAt ( i ) == '\n' ) ) { ++ i ; } break ; case '\n' : sb . append ( lineSeparator ) ; break ; default : sb . append ( ch ) ; break ; } } return sb . toString ( ) ; }
target:  Return a CharSequence with lines (separated by LF, CR/LF, or CR) terminated by the platform specific line separator.