fix typo

Author: PhilippBach

doubleml/did/did.py

@@ -47,7 +47,7 @@ class DoubleMLDID(LinearScoreMixin, DoubleML):
         Default is ``'observational'``.
 
     in_sample_normalization : bool
-        Indicates whether to use a sligthly different normalization from Sant'Anna and Zhao (2020).
+        Indicates whether to use a slightly different normalization from Sant'Anna and Zhao (2020).
         Default is ``True``.
 
     trimming_rule : str

doubleml/did/did_binary.py

@@ -80,7 +80,7 @@ class DoubleMLDIDBinary(LinearScoreMixin, DoubleML):
         Default is ``'observational'``.
 
     in_sample_normalization : bool
-        Indicates whether to use a sligthly different normalization from Sant'Anna and Zhao (2020).
+        Indicates whether to use a slightly different normalization from Sant'Anna and Zhao (2020).
         Default is ``True``.
 
     trimming_rule : str

doubleml/did/did_cs.py

@@ -47,7 +47,7 @@ class DoubleMLDIDCS(LinearScoreMixin, DoubleML):
         Default is ``'observational'``.
 
     in_sample_normalization : bool
-        Indicates whether to use a sligthly different normalization from Sant'Anna and Zhao (2020).
+        Indicates whether to use a slightly different normalization from Sant'Anna and Zhao (2020).
         Default is ``True``.
 
     trimming_rule : str

doubleml/did/did_cs_binary.py

@@ -80,7 +80,7 @@ class DoubleMLDIDCSBinary(LinearScoreMixin, DoubleML):
             Default is ``'observational'``.
 
         in_sample_normalization : bool
-            Indicates whether to use a sligthly different normalization from Sant'Anna and Zhao (2020).
+            Indicates whether to use a slightly different normalization from Sant'Anna and Zhao (2020).
             Default is ``True``.
 
         trimming_rule : str