fix typo, staticmethod etc. (#1402)

* config.py: fix typo; static method

* fix typo in qlib/utils/paral

* 1) limit numpy version as numba support for 1.24+ has not been released; 2) no need to use custom numba version for pytest.

* remove useless argument

Co-authored-by: you-n-g <you-n-g@users.noreply.github.com>

qlib/utils/paral.py

@@ -24,7 +24,7 @@ class ParallelExt(Parallel):
 
 
 def datetime_groupby_apply(
-    df, apply_func: Union[Callable, Text], axis=0, level="datetime", resample_rule="M", n_jobs=-1, skip_group=False
+    df, apply_func: Union[Callable, Text], axis=0, level="datetime", resample_rule="M", n_jobs=-1
 ):
     """datetime_groupby_apply
     This function will apply the `apply_func` on the datetime level index.
@@ -116,7 +116,7 @@ class AsyncCaller:
 # The code are for implementing following workflow
 # - Construct complex data structure nested with delayed joblib tasks
 #      - For example,  {"job": [<delayed_joblib_task>,  {"1": <delayed_joblib_task>}]}
-# - executing all the tasks and replace all the <deplayed_joblib_task> with its return value
+# - executing all the tasks and replace all the <delayed_joblib_task> with its return value
 
 # This will make it easier to convert some existing code to a parallel one
 
@@ -160,7 +160,7 @@ class DelayedDict(DelayedTask):
     It is designed for following feature:
     Converting following existing code to parallel
     - constructing a dict
-    - key can be get instantly
+    - key can be gotten instantly
     - computation of values tasks a lot of time.
         - AND ALL the values are calculated in a SINGLE function
     """
@@ -280,7 +280,7 @@ def complex_parallel(paral: Parallel, complex_iter):
 
 class call_in_subproc:
     """
-    When we repeating run functions, it is hard to avoid memory leakage.
+    When we repeatedly run functions, it is hard to avoid memory leakage.
     So we run it in the subprocess to ensure it is OK.
 
     NOTE: Because local object can't be pickled. So we can't implement it via closure.