Fixed capitalization on inline comments in last join example.

Author: BethanyG

concepts/strings/about.md

@@ -202,13 +202,13 @@ If a `list`, `tuple`, `set` or other collection of individual strings needs to b
 # 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'
 ```