Corrected Doc String of from_dataframe according to comments of Larissa

tsg/main.py

@@ -216,9 +216,11 @@ class Gtf:
         self.df = pd.concat([filter_df(chunk) for chunk in reader])
 
     def from_dataframe(self, df: pd.DataFrame) -> None:
-        """ Checks which columns belong to the free-text part of the GTF-file. 
-        
-        Checks if there are no columns called free-text and if so, sets the value of self.parsed to TRUE.
+        """ Initializes Gtf object from pandas Dataframe. 
+        Part of initialization is: 
+        Set dataframe attribute 
+        Check which columns belong to the free-text part of the GTF-file.
+        Check if there are no columns called free-text and if so, sets the value of parsed attribute to TRUE.
 
         Args:
             df: DataFrame