flush output buffer before formatting

src/third_party/stb/stb_sprintf.h

@@ -635,6 +635,8 @@ cl = lg;                                 \
       case 'm':
       case 'M':
       {
+        stbsp__flush_cb();
+
         static const U64 one_kib = 1ull * 1024;
         static const U64 one_mib = 1ull * 1024 * 1024;
         static const U64 one_gib = 1ull * 1024 * 1024 * 1024;
@@ -746,25 +748,9 @@ cl = lg;                                 \
 
       case 'r':
       {
+        stbsp__flush_cb();
         Rng1U64 range = va_arg(va, Rng1U64);
-        *bf = '['; ++bf;
+        bf += STB_SPRINTF_DECORATE(sprintf)(bf, "[0x%llx, 0x%llx]", range.min, range.max);
-
-        U8 buffer[ARENA_HEADER_SIZE + 128];
-        Arena *arena = arena_alloc_(&(ArenaParams){ .flags = ArenaFlag_NoChain, .reserve_size = sizeof(buffer), .commit_size = sizeof(buffer), .optional_backing_buffer = buffer });
-
-        String8 min = str8_from_u64(arena, range.min, 16, 0, 0);
-        MemoryCopy(bf, min.str, min.size);
-        bf += min.size;
-
-        *bf = ','; ++bf;
-        *bf = ' '; ++bf;
-
-        arena_clear(arena);
-        String8 max = str8_from_u64(arena, range.max, 16, 0, 0);
-        MemoryCopy(bf, max.str, max.size);
-        bf += max.size;
-
-        *bf = ')'; ++bf;
       }break;
 
       //