fixing docs

src/datachain/func/conditional.py

@@ -94,12 +94,13 @@ def case(
     """
     Returns the case function that produces case expression which has a list of
     conditions and corresponding results. Results can only be python primitives
-    like string, numbes or booleans. Result type is inferred from condition results.
+    like string, numbers or booleans. Result type is inferred from condition results.
 
     Args:
         args (tuple((ColumnElement, Func), (str | int | float | complex | bool, Func))):
-            - Tuple of condition and values pair
-        else_ (str | int | float | complex | bool, Func): else value in case expression
+            Tuple of condition and values pair.
+        else_ (str | int | float | complex | bool, Func): else value in case
+            expression.
 
     Returns:
         Func: A Func object that represents the case function.
@@ -128,7 +129,7 @@ def _get_type(val):
         arg_type = _get_type(arg[1])
         if type_ and arg_type != type_:
             raise DataChainParamsError(
-                f"Statement values must be of the same type, got {type_} amd {arg_type}"
+                f"Statement values must be of the same type, got {type_} and {arg_type}"
             )
         type_ = arg_type
 
@@ -152,11 +153,11 @@ def ifelse(
     Result type is inferred from the values.
 
     Args:
-        condition: (ColumnElement, Func) - condition which is evaluated
-        if_val: (str | int | float | complex | bool, Func): value for true
-            condition outcome
-        else_val: (str | int | float | complex | bool, Func): value for false condition
-            outcome
+        condition (ColumnElement, Func):  Condition which is evaluated.
+        if_val (str | int | float | complex | bool, Func): Value for true
+            condition outcome.
+        else_val (str | int | float | complex | bool, Func): Value for false condition
+            outcome.
 
     Returns:
         Func: A Func object that represents the ifelse function.
@@ -174,6 +175,7 @@ def ifelse(
 def isnone(col: Union[str, Column]) -> Func:
     """
     Returns True if column value is None, otherwise False
+
     Args:
         col (str | Column): Column to check if it's None or not.
             If a string is provided, it is assumed to be the name of the column.
@@ -183,7 +185,7 @@ def isnone(col: Union[str, Column]) -> Func:
 
     Example:
         ```py
-        dc.mutate(test=ifelse(isnone("col"), "NONE", "NOT_NONE"))
+        dc.mutate(test=ifelse(isnone("col"), "EMPTY", "NOT_EMPTY"))
         ```
     """
     from datachain import C
@@ -192,4 +194,4 @@ def isnone(col: Union[str, Column]) -> Func:
         # if string, it is assumed to be the name of the column
         col = C(col)
 
-    return case((col == None, True), else_=False)  # type: ignore [arg-type]  # noqa: E711
+    return case((col == None, True), else_=False)  # noqa: E711