testsuite: harmless dg-* whitespace fixes

testsuite: harmless dg-* whitespace fixes

These just fix inconsistent/unusual style to avoid noise when grepping
and also people picking up bad habits when they see it (as similar
mistakes can be harmful).

gcc/testsuite/ChangeLog:

	* c-c++-common/goacc/pr69916.c: Fix unusual whitespace in dg-*.
	* g++.old-deja/g++.abi/vtable2.C: Ditto.
	* g++.old-deja/g++.bugs/900330_02.C: Ditto.
	* g++.old-deja/g++.bugs/900406_02.C: Ditto.
	* g++.old-deja/g++.bugs/900519_13.C: Ditto.
	* g++.old-deja/g++.mike/p9068.C: Ditto.
	* gcc.dg/20040203-1.c: Ditto.
	* gcc.dg/980502-1.c: Ditto.
	* gcc.dg/ipa/ipa-sra-14.c: Ditto.
	* gcc.dg/pr35468.c: Ditto.
	* gcc.dg/pr82597.c: Ditto.
	* gcc.dg/tree-ssa/phi-opt-7.c: Ditto.
	* gfortran.dg/assumed_charlen_in_main.f90: Ditto.
	* gfortran.dg/cray_pointers_2.f90: Ditto.