изменяет внешний вид программы C, вставляя или удаляя пробелы  (changes the appearance of a C program by inserting or deleting whitespace.)
  
--blank-lines-after-declarations
The '-bad' option forces a blank line after every block of
       declarations.  The '-nbad' option does not add any such blank
       lines.
       For example, given the input
            char *foo;
            char *bar;
            /* This separates blocks of declarations.  */
            int baz;
       indent -bad produces
            char *foo;
            char *bar;
            /* This separates blocks of declarations.  */
            int baz;
       and indent -nbad produces
            char *foo;
            char *bar;
            /* This separates blocks of declarations.  */
            int baz;