* pretty-print.h (pp_underscore): New.
	(pp_comma): Tidy.
	* gimple-pretty-print.c (dump_unary_rhs): Use specialized pretty
	printer functions instead of pp_character.
	(dump_binary_rhs): Likewise.
	(dump_ternary_rhs): Likewise.
	(dump_gimple_call_args): Likewise.
	(pp_points_to_solution): Likewise.
	(dump_gimple_call): Likewise.
	(dump_gimple_switch): Likewise.
	(dump_gimple_cond): Likewise.
	(dump_gimple_bind): Likewise.
	(dump_gimple_try): Likewise.
	(dump_gimple_omp_for): Likewise.
	(dump_gimple_omp_continue): Likewise.
	(dump_gimple_omp_single): Likewise.
	(dump_gimple_omp_sections): Likewise.
	(dump_gimple_omp_block): Likewise.
	(dump_gimple_omp_critical): Likewise.
	(dump_gimple_transaction): Likewise.
	(dump_gimple_asm): Likewise.
	(dump_gimple_phi): Likewise.
	(dump_gimple_omp_parallel): Likewise.
	(dump_gimple_omp_task): Likewise.
	(dump_gimple_omp_atomic_load): Likewise.
	(dump_gimple_omp_atomic_store): Likewise.
	(dump_gimple_mem_ops): Likewise.
	(pp_gimple_stmt_1): Likewise.
	(pp_cfg_jump): Likewise.
	(dump_implicit_edges): Likewise.
	(gimple_dump_bb_for_graph): Likewise.
	* graph.c (draw_cfg_node): Likewise.
	* langhooks.c (lhd_print_error_function): Likewise.
	* sched-vis.c (print_exp): Likewise.
	(print_value): Likewise.
	(print_pattern): Likewise.
	(print_insn): Likewise.
	(rtl_dump_bb_for_graph): Likewise.
	* tree-pretty-print.c (dump_function_declaration): Likewise.
	(dump_array_domain): Likewise.
	(dump_omp_clause): Likewise.
	(dump_location): Likewise.
	(dump_generic_node): Likewise.
	(print_struct_decl): Likewise.
	* diagnostic.c (diagnostic_show_locus): Use pp_space.

c-family/
	* c-ada-spec.c (print_ada_macros): Use specialized pretty printer
	functions instead of pp_character.
	(pp_ada_tree_identifier): Likewise.
	(dump_ada_double_name): Likewise.
	(dump_ada_function_declaration): Likewise.
	(dump_ada_array_domains): Likewise.
	(dump_template_types): Likewise.
	(dump_generic_ada_node): Likewise.
	(print_ada_declaration): Likewise.
	(print_ada_struct_decl): Likewise.
	* c-pretty-print.c (pp_c_integer_constant): Likewise.

cp/
	* error.c (dump_aggr_type): Use specialized pretty printer
	functions instead of pp_character.
	(dump_type_prefix): Likewise.
	(dump_simple_decl): Likewise.
	(type_to_string): Likewise.

From-SVN: r201467