Format the generated code for GO TO statements slightly

[yutaro-sakamoto]

       identification division.
       program-id.      prog.
       procedure          division.
           GO TO PROC-A.
       PROC-A.
           STOP RUN.

Older compilers generates the following Java code for the above GO TO statement

        /* prog.cbl:4: GO TO */
        {
          if(true) return Optional.of(contList[l_MAIN__PROC_A          ]);

        }

Due to this PR, the compiler will generate the following code

        /* prog.cbl:4: GO TO */
        {
          if(true) return Optional.of(contList[l_MAIN__PROC_A]);
        }

[Copilot]

Pull request overview

This PR improves code formatting for COBOL GO TO statement compilation by removing an unintended blank line after generated Java code. The change refactors the output method from joutput_line("]);\n") (which added an extra newline) to joutput("]);") followed by joutput_newline(), producing cleaner generated code with proper single-line spacing.

• Removes blank line after GO TO statements in generated Java code
• Refactors output method calls for better control over newlines

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