Fix up whitespacing

gcc/cp/ChangeLog

gcc/cp/call.c

gcc/cp/cfns.h

gcc/cp/class.c

gcc/cp/cp-gimplify.c

gcc/cp/cp-lang.c

gcc/cp/cp-objcp-common.c

gcc/cp/cp-tree.h

gcc/cp/cxx-pretty-print.c

gcc/cp/decl.c

gcc/cp/decl2.c

gcc/cp/error.c

gcc/cp/except.c

gcc/cp/init.c

gcc/cp/mangle.c

gcc/cp/method.c

gcc/cp/name-lookup.c

gcc/cp/name-lookup.h

gcc/cp/parser.c

gcc/cp/pt.c