Cleaned up in-line comments per PR review.

Author: BethanyG

concepts/strings/about.md

@@ -173,7 +173,7 @@ If a `list`, `tuple`, `set` or other collection of individual strings needs to b
 
 ```python
 # str.join() makes a new string from the iterables elements.
->>> chickens = ["hen", "egg", "rooster"] #lists are iterable
+>>> chickens = ["hen", "egg", "rooster"] # Lists are iterable.
 >>> ' '.join(chickens)
 'hen egg rooster'
 
@@ -186,29 +186,29 @@ If a `list`, `tuple`, `set` or other collection of individual strings needs to b
 
 
 # Any iterable can be used as input.
->>> flowers = ("rose", "daisy", "carnation")  #tuples are iterable
+>>> flowers = ("rose", "daisy", "carnation")  # Tuples are iterable.
 >>> '*-*'.join(flowers)
 'rose*-*daisy*-*carnation'
 
->>> flowers = {"rose", "daisy", "carnation"}  #sets are iterable, but output order is not guaranteed.
+>>> flowers = {"rose", "daisy", "carnation"}  # Sets are iterable, but output order is not guaranteed.
 >>> '*-*'.join(flowers)
 'rose*-*carnation*-*daisy'
 
->>> phrase = "This is my string"  #strings are iterable, but be careful!
+>>> phrase = "This is my string"  # Strings are iterable, but be careful!
 >>> '..'.join(phrase)
 'T..h..i..s.. ..i..s.. ..m..y.. ..s..t..r..i..n..g'
 
 
 # Separators are inserted **between** elements, but can be any string (including spaces).
 # This can be exploited for interesting effects.
 >>> under_words = ['under', 'current', 'sea', 'pin', 'dog', 'lay']
->>> separator = ' ⤴️ under' #note the leading space, but no trailing space.
+>>> separator = ' ⤴️ under' # note the leading space, but no trailing space.
 >>> separator.join(under_words)
 'under ⤴️ undercurrent ⤴️ undersea ⤴️ underpin ⤴️ underdog ⤴️ underlay'
 
 # The separator can be composed different ways, as long as the result is a string.
 >>> upper_words = ['upper', 'crust', 'case', 'classmen', 'most', 'cut']
->>> separator = ' 🌟 ' + upper_words[0] #this becomes one string, similar to ' ⤴️ under'.
+>>> separator = ' 🌟 ' + upper_words[0] # this becomes one string, similar to ' ⤴️ under'.
 >>> separator.join(upper_words)
  'upper 🌟 uppercrust 🌟 uppercase 🌟 upperclassmen 🌟 uppermost 🌟 uppercut'
 ```

exercises/concept/little-sisters-vocab/.docs/introduction.md

@@ -50,7 +50,7 @@ If a `list`, `tuple`, `set` or other collection of individual strings needs to b
 
 ```python
 # str.join() makes a new string from the iterables elements.
->>> chickens = ["hen", "egg", "rooster"] #lists are iterable
+>>> chickens = ["hen", "egg", "rooster"] # Lists are iterable.
 >>> ' '.join(chickens)
 'hen egg rooster'
 
@@ -63,15 +63,15 @@ If a `list`, `tuple`, `set` or other collection of individual strings needs to b
 
 
 # Any iterable can be used as input.
->>> flowers = ("rose", "daisy", "carnation")  #tuples are iterable
+>>> flowers = ("rose", "daisy", "carnation")  # Tuples are iterable.
 >>> '*-*'.join(flowers)
 'rose*-*daisy*-*carnation'
 
->>> flowers = {"rose", "daisy", "carnation"}  #sets are iterable, but output order is not guaranteed.
+>>> flowers = {"rose", "daisy", "carnation"}  # Sets are iterable, but output order is not guaranteed.
 >>> '*-*'.join(flowers)
 'rose*-*carnation*-*daisy'
 
->>> phrase = "This is my string"  #strings are iterable, but be careful!
+>>> phrase = "This is my string"  # Strings are iterable, but be careful!
 >>> '..'.join(phrase)
 'T..h..i..s.. ..i..s.. ..m..y.. ..s..t..r..i..n..g'