fix tablle formatting

docs/Experiments.rst

@@ -18,19 +18,19 @@ Data
 
 We used 5 datasets to conduct our comparison experiments. Details of data are listed in the following table:
 
-+-----------+-----------------------+------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
-| Data      | Task                  | Link                                                                   | #Train\_Set | #Feature | Comments                                     |
-+===========+=======================+========================================================================+=============+==========+==============================================+
-| Higgs     | Binary classification | `link <https://archive.ics.uci.edu/ml/datasets/HIGGS>`__               | 10,500,000  | 28       | last 500,000 samples were used as test set   |
-+-----------+-----------------------+------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
-| Yahoo LTR | Learning to rank      | `link <https://webscope.sandbox.yahoo.com/catalog.php?datatype=c>`__   | 473,134     | 700      | set1.train as train, set1.test as test       |
-+-----------+-----------------------+------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
-| MS LTR    | Learning to rank      | `link <https://www.microsoft.com/en-us/research/project/mslr/>`__      | 2,270,296   | 137      | {S1,S2,S3} as train set, {S5} as test set    |
-+-----------+-----------------------+------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
++-----------+-----------------------+---------------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
+| Data      | Task                  | Link                                                                            | #Train\_Set | #Feature | Comments                                     |
++===========+=======================+=================================================================================+=============+==========+==============================================+
+| Higgs     | Binary classification | `link <https://archive.ics.uci.edu/dataset/280/higgs>`__                        | 10,500,000  | 28       | last 500,000 samples were used as test set   |
++-----------+-----------------------+---------------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
+| Yahoo LTR | Learning to rank      | `link <https://webscope.sandbox.yahoo.com/catalog.php?datatype=c>`__            | 473,134     | 700      | set1.train as train, set1.test as test       |
++-----------+-----------------------+---------------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
+| MS LTR    | Learning to rank      | `link <https://www.microsoft.com/en-us/research/project/mslr/>`__               | 2,270,296   | 137      | {S1,S2,S3} as train set, {S5} as test set    |
++-----------+-----------------------+---------------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
 | Expo      | Binary classification | `link <https://community.amstat.org/jointscsg-section/dataexpo/dataexpo2009>`__ | 11,000,000  | 700      | last 1,000,000 samples were used as test set |
-+-----------+-----------------------+------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
-| Allstate  | Binary classification | `link <https://www.kaggle.com/c/ClaimPredictionChallenge>`__           | 13,184,290  | 4228     | last 1,000,000 samples were used as test set |
-+-----------+-----------------------+------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
++-----------+-----------------------+---------------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
+| Allstate  | Binary classification | `link <https://www.kaggle.com/c/ClaimPredictionChallenge>`__                    | 13,184,290  | 4228     | last 1,000,000 samples were used as test set |
++-----------+-----------------------+---------------------------------------------------------------------------------+-------------+----------+----------------------------------------------+
 
 Environment
 ^^^^^^^^^^^