Fix commit message formatting in multi-commit uploads
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<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006760 / 0.011353 (-0.004593) | 0.003918 / 0.011008 (-0.007091) | 0.084016 / 0.038508 (0.045508) | 0.069927 / 0.023109 (0.046818) | 0.307898 / 0.275898 (0.032000) | 0.337453 / 0.323480 (0.013973) | 0.004132 / 0.007986 (-0.003854) | 0.003248 / 0.004328 (-0.001081) | 0.064526 / 0.004250 (0.060275) | 0.056424 / 0.037052 (0.019371) | 0.316313 / 0.258489 (0.057824) | 0.356302 / 0.293841 (0.062461) | 0.030634 / 0.128546 (-0.097912) | 0.008467 / 0.075646 (-0.067180) | 0.286676 / 0.419271 (-0.132595) | 0.051813 / 0.043533 (0.008280) | 0.309874 / 0.255139 (0.054735) | 0.332513 / 0.283200 (0.049313) | 0.023919 / 0.141683 (-0.117764) | 1.509033 / 1.452155 (0.056878) | 1.549636 / 1.492716 (0.056920) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.221464 / 0.018006 (0.203458) | 0.447873 / 0.000490 (0.447384) | 0.002408 / 0.000200 (0.002208) | 0.000090 / 0.000054 (0.000035) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.027634 / 0.037411 (-0.009777) | 0.081802 / 0.014526 (0.067276) | 0.781489 / 0.176557 (0.604933) | 0.165184 / 0.737135 (-0.571951) | 0.121526 / 0.296338 (-0.174813) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.408215 / 0.215209 (0.193006) | 4.091192 / 2.077655 (2.013538) | 2.062608 / 1.504120 (0.558488) | 1.895747 / 1.541195 (0.354552) | 1.873682 / 1.468490 (0.405192) | 0.484184 / 4.584777 (-4.100593) | 3.469096 / 3.745712 (-0.276616) | 3.365325 / 5.269862 (-1.904537) | 2.000333 / 4.565676 (-2.565343) | 0.056661 / 0.424275 (-0.367614) | 0.007100 / 0.007607 (-0.000507) | 0.478587 / 0.226044 (0.252542) | 4.768703 / 2.268929 (2.499774) | 2.472432 / 55.444624 (-52.972192) | 2.133611 / 6.876477 (-4.742865) | 2.154296 / 2.142072 (0.012223) | 0.582293 / 4.805227 (-4.222934) | 0.131932 / 6.500664 (-6.368732) | 0.060259 / 0.075469 (-0.015211) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.259167 / 1.841788 (-0.582620) | 18.465604 / 8.074308 (10.391296) | 14.024528 / 10.191392 (3.833136) | 0.162320 / 0.680424 (-0.518104) | 0.018144 / 0.534201 (-0.516057) | 0.389931 / 0.579283 (-0.189352) | 0.396456 / 0.434364 (-0.037908) | 0.454734 / 0.540337 (-0.085603) | 0.636406 / 1.386936 (-0.750530) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006565 / 0.011353 (-0.004788) | 0.004008 / 0.011008 (-0.007000) | 0.064526 / 0.038508 (0.026018) | 0.071963 / 0.023109 (0.048854) | 0.415456 / 0.275898 (0.139557) | 0.441199 / 0.323480 (0.117719) | 0.005619 / 0.007986 (-0.002366) | 0.003261 / 0.004328 (-0.001067) | 0.064817 / 0.004250 (0.060567) | 0.055349 / 0.037052 (0.018296) | 0.425172 / 0.258489 (0.166683) | 0.452629 / 0.293841 (0.158788) | 0.031676 / 0.128546 (-0.096870) | 0.008432 / 0.075646 (-0.067214) | 0.071752 / 0.419271 (-0.347519) | 0.047176 / 0.043533 (0.003643) | 0.408641 / 0.255139 (0.153502) | 0.428579 / 0.283200 (0.145380) | 0.021548 / 0.141683 (-0.120135) | 1.495153 / 1.452155 (0.042999) | 1.557933 / 1.492716 (0.065217) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.212749 / 0.018006 (0.194743) | 0.441263 / 0.000490 (0.440773) | 0.005831 / 0.000200 (0.005631) | 0.000092 / 0.000054 (0.000037) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031844 / 0.037411 (-0.005567) | 0.091590 / 0.014526 (0.077064) | 0.102859 / 0.176557 (-0.073697) | 0.155859 / 0.737135 (-0.581276) | 0.104717 / 0.296338 (-0.191622) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.425924 / 0.215209 (0.210715) | 4.292829 / 2.077655 (2.215174) | 2.314350 / 1.504120 (0.810230) | 2.163087 / 1.541195 (0.621892) | 2.217310 / 1.468490 (0.748820) | 0.490889 / 4.584777 (-4.093887) | 3.498287 / 3.745712 (-0.247425) | 3.224980 / 5.269862 (-2.044881) | 1.987739 / 4.565676 (-2.577938) | 0.057486 / 0.424275 (-0.366790) | 0.007199 / 0.007607 (-0.000408) | 0.501194 / 0.226044 (0.275149) | 5.015202 / 2.268929 (2.746273) | 2.816307 / 55.444624 (-52.628318) | 2.474593 / 6.876477 (-4.401884) | 2.649510 / 2.142072 (0.507437) | 0.597167 / 4.805227 (-4.208060) | 0.131199 / 6.500664 (-6.369465) | 0.059532 / 0.075469 (-0.015938) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.384053 / 1.841788 (-0.457734) | 18.964201 / 8.074308 (10.889893) | 14.336209 / 10.191392 (4.144817) | 0.187522 / 0.680424 (-0.492902) | 0.020201 / 0.534201 (-0.514000) | 0.394778 / 0.579283 (-0.184505) | 0.408393 / 0.434364 (-0.025971) | 0.470965 / 0.540337 (-0.069373) | 0.667974 / 1.386936 (-0.718962) |

</details>
</details>

![](https://cml.dev/watermark.png#3b3333d790800ddaa3bf386ee71dc800258c921c "CML watermark")

Currently, the commit message keeps on adding:

- `Upload dataset (part 00000-of-00002)`
- `Upload dataset (part 00000-of-00002) (part 00001-of-00002)`

Introduced in https://github.com/huggingface/datasets/pull/6269

This PR fixes this issue to have

- `Upload dataset (part 00000-of-00002)`
- `Upload dataset (part 00001-of-00002)`