Fix an assertion

libc/stdio/Make.defs

@@ -37,7 +37,7 @@
 # This first group of C files do not depend on having file descriptors or
 # C streams.
 
-CSRCS += lib_fileno.c lib_printf.c lib_syslog.c lib_lowsyslog.c\
+CSRCS += lib_fileno.c lib_printf.c lib_syslog.c lib_lowsyslog.c \
 		 lib_sprintf.c lib_asprintf.c lib_snprintf.c lib_libsprintf.c \
 		 lib_vsprintf.c lib_avsprintf.c lib_vsnprintf.c lib_libvsprintf.c \
 		 lib_dprintf.c lib_vdprintf.c \

libc/stdio/lib_vdprintf.c

@@ -56,4 +56,4 @@ int vdprintf(int fd, FAR const char *fmt, va_list ap)
 
    lib_rawoutstream(&rawoutstream, fd);
    return lib_vsprintf(&rawoutstream.public, fmt, ap);
-} 
+}