Update source/wrangling.md

Co-authored-by: Joel Ostblom <[email protected]>

Author: trevorcampbell

source/wrangling.md

@@ -1556,7 +1556,7 @@ the maximum value between `mother_tongue`,
 `most_at_home`, `most_at_work` and `lang_known` for each language
 and region, just as we specified! 
 
-To instead create an entirely new data frame with the `assign` method, we specify one argument for each column we want to create.
+To instead create an entirely new data frame, we can use the `assign` method and specify one argument for each column we want to create.
 In this case we want to create one new column named `maximum`, so the argument
 to `assign` begins with `maximum = `.
 Then after the `=`, we specify what the contents of that new column