fix pr feedbacks

valentin-p · BethanyG · commit b4047843442c · 2021-02-10T05:33:15.000-08:00
diff --git a/concepts/string-methods/introduction.md b/concepts/string-methods/introduction.md
@@ -1,7 +1,7 @@
 Python provides several useful methods that can be used to manipulate strings.
 These methods can be used for cleaning, splitting, translating, or otherwise working with any object of type `str`.
 Strings can be concatenated using the `+` operator or with `str.join()`.
-Strings also implement all of the common operations for a sequence and can be iterated using the syntax: `for item in <string>`.
+Strings also implement all common sequence operations and can be iterated through using the `for item in <string>` syntax.
 
 Strings are immutable, meaning the value of a `str` object in memory cannot change.
-It means the standard library methods will return a new instance of `str` instead of modifying the existing `str`.
+That means any functions or methods that operate on a `str` object will return a _new instance_ or copy of that `str`, instead of modifying the original.
diff --git a/exercises/concept/little-sisters-essay/.docs/instructions.md b/exercises/concept/little-sisters-essay/.docs/instructions.md
@@ -4,7 +4,7 @@ You have four tasks to clean up and modify strings.
 
 ## 1. Capitalize the title of the paper
 
-Any good paper needs a properly formatted title. Implement the function `capitalize_title()` which takes `title` as parameter and capitalizes the first letter of each word of the title. This function will return a `str`.
+Any good paper needs a properly formatted title. Implement the function `capitalize_title()` which takes `title` as a parameter, and capitalizes the first letter of each word of the title. This function will return a `str`.
 
 ```python
 >>> capitalize_title("my hobbies")
@@ -22,7 +22,8 @@ True
 
 ## 3. Clean up spacing
 
-For the paper to look professional, you need to remove unnecessary spacing. Implement the function `remove_extra_spaces()` which takes `sentence` as a parameter and removes any extra whitespace at the beginning and the end of the sentence. This function should return a `str`.
+To make the paper _even better_, you can replace some of the adjectives with synonyms. Write the function `replace_word_choice()` that takes `sentence`, `old_word`, and `new_word` as parameters.
+This function should replace all instances of the `old_word` with the `new_word`, and return a new `str` with the updated sentence.
 
 ```python
 >>> remove_extra_spaces(" I like to go on hikes with my dog.  ")
diff --git a/exercises/concept/little-sisters-essay/.docs/introduction.md b/exercises/concept/little-sisters-essay/.docs/introduction.md
@@ -1,7 +1,7 @@
 Python provides several useful methods that can be used to manipulate strings.
-These methods can be used for cleaning, splitting, translating any variable of type `str`.
-Strings can be concatenated using the `+` operator or with `str.join()`.
-Strings also implement all of the common operations for a sequence and can be iterated using the syntax: `for item in <string>`.
+These methods can be used for cleaning, splitting, translating, or otherwise working with any object of type `str`.
+Strings can be concatenated using the `+` operator or with the `str.join()` method.
+Strings also implement all common sequence operations and can be iterated through using the `for item in <string>` syntax.
 
-`Strings` are immutable, meaning their value in memory cannot change.
-It means the standard library methods will return a new instance of `str` instead of modifying the existing `str`.
+Strings are immutable, meaning the value of a `str` object in memory cannot change.
+That means any functions or methods that operate on a `str` (like the ones we are learning about here) will return a _new instance_ of that `str` instead of modifying the original `str` object.
