Fix the Errors with unexpected indentation when building Qlib's documentation (#1352)

* Fix ERROR: Unexpected indentation in qlib/data/dataset/handler.py

* Fix ERROR: Unexpected indentation in qlib/data/dataset/__init__.py

* Fix ERROR: Unexpected indentation in ../qlib/data/cache.py

* Fix ERROR: Unexpected indentation in qlib/model/meta/task.py

* Fix ERROR: Unexpected indentation in qlib/model/meta/dataset.py

* Fix ERROR: Unexpected indentation in qlib/workflow/online/manager.py

* Fix ERROR: Unexpected indentation in qlib/workflow/online/update.py

* Fix ERROR: Unexpected indentation in /qlib/workflow/__init__.py

* Fix ERROR: Unexpected indentation in qlib/data/base.py

* Fix ERROR: Unexpected indentation in qlib/data/dataset/loader.py

* Fix ERROR: Unexpected indentation in qlib/contrib/evaluate.py

* Fix ERROR: Unexpected indentation in qlib/workflow/record_temp.py

* Fix ERROR: Unexpected indentation in qlib/workflow/task/gen.py

* Fix ERROR: Unexpected indentation in qlib/strategy/base.py

* Fix qlib/data/dataset/handler.py

* Retest

qlib/workflow/__init__.py

@@ -350,6 +350,7 @@ class QlibRecorder:
         Method to reset the current uri of current experiment manager.
 
         NOTE:
+
         - When the uri is refer to a file path, please using the absolute path instead of strings like "~/mlruns/"
           The backend don't support strings like this.
         """

qlib/workflow/online/manager.py

@@ -78,7 +78,9 @@ For simplicity
 
 
 # Can we simplify current workflow?
+
 - Can reduce the number of state of tasks?
+
     - For each task, we have three phases (i.e. task, partly trained task, final trained task)
 """
 

qlib/workflow/online/update.py

@@ -82,19 +82,23 @@ class RecordUpdater(metaclass=ABCMeta):
 class DSBasedUpdater(RecordUpdater, metaclass=ABCMeta):
     """
     Dataset-Based Updater
+
     - Providing updating feature for Updating data based on Qlib Dataset
 
     Assumption
-    - Based on Qlib dataset
-    - The data to be updated is a multi-level index pd.DataFrame. For example label , prediction.
 
-                                 LABEL0
-        datetime   instrument
-        2021-05-10 SH600000    0.006965
-                   SH600004    0.003407
-        ...                         ...
-        2021-05-28 SZ300498    0.015748
-                   SZ300676   -0.001321
+    - Based on Qlib dataset
+    - The data to be updated is a multi-level index pd.DataFrame. For example label, prediction.
+
+        .. code-block::
+
+                                     LABEL0
+            datetime   instrument
+            2021-05-10 SH600000    0.006965
+                       SH600004    0.003407
+            ...                         ...
+            2021-05-28 SZ300498    0.015748
+                       SZ300676   -0.001321
     """
 
     def __init__(
@@ -111,6 +115,7 @@ class DSBasedUpdater(RecordUpdater, metaclass=ABCMeta):
         Init PredUpdater.
 
         Expected behavior in following cases:
+
         - if `to_date` is greater than the max date in the calendar, the data will be updated to the latest date
         - if there are data before `from_date` or after `to_date`, only the data between `from_date` and `to_date` are affected.
 
@@ -118,11 +123,15 @@ class DSBasedUpdater(RecordUpdater, metaclass=ABCMeta):
             record : Recorder
             to_date :
                 update to prediction to the `to_date`
+
                 if to_date is None:
+
                     data will updated to the latest date.
             from_date :
                 the update will start from `from_date`
+
                 if from_date is None:
+
                     the updating will occur on the next tick after the latest data in historical data
             hist_ref : int
                 Sometimes, the dataset will have historical depends.

qlib/workflow/record_temp.py

@@ -349,7 +349,9 @@ class PortAnaRecord(ACRecordTemp):
     This is the Portfolio Analysis Record class that generates the analysis results such as those of backtest. This class inherits the ``RecordTemp`` class.
 
     The following files will be stored in recorder
+
     - report_normal.pkl & positions_normal.pkl:
+
         - The return report and detailed positions of the backtest, returned by `qlib/contrib/evaluate.py:backtest`
     - port_analysis.pkl : The risk analysis of your portfolio, returned by `qlib/contrib/evaluate.py:risk_analysis`
     """

qlib/workflow/task/gen.py

@@ -94,7 +94,9 @@ def handler_mod(task: dict, rolling_gen):
     """
     Help to modify the handler end time when using RollingGen
     It try to handle the following case
+
     - Hander's data end_time is earlier than  dataset's test_data's segments.
+
         - To handle this, handler's data's end_time is extended.
 
     If the handler's end_time is None, then it is not necessary to change it's end time.