remove trailing whitespace

Signed-off-by: Alok Kumar <[email protected]>

Author: alok1304

docs/source/how-to-guides/add_new_license_detection_rule.rst

@@ -77,12 +77,12 @@ More (advanced) rules options:
   and `}}` tags. Key phrases are words that **must** be matched/present in order
   for a RULE to be considered a match.
 
-- You can add an optional extra-phrase marker like ``[[n]]`` in rules where extra  
-  words may be present, for example, a copyright holder name. Here, ``n``  
-  denotes the **maximum number of extra words** that may appear at that position.  
+- You can add an optional extra-phrase marker like ``[[n]]`` in rules where extra
+  words may be present, for example, a copyright holder name. Here, ``n``
+  denotes the **maximum number of extra words** that may appear at that position.
   This tag is used in rules where extra words are expected but not required.
 
-  - For example, ``[[5]]`` allows up to 5 extra words at that position. If the  
+  - For example, ``[[5]]`` allows up to 5 extra words at that position. If the
     extra words appear in the **correct position**, the match score is increased to 100.
 
 See the ``src/licensedcode/models.py`` directory for a list of all possible values