PRR fixes

Author: Chris Cho

source/style-guide/style/punctuation.txt

@@ -60,13 +60,10 @@ Use the following guidelines for colons:
 - If a title or heading includes a colon, capitalize the first word
   that follows the colon, regardless of its part of speech.
 
-- "Lowercase or capital letter after a colon. When a colon is used within
-  a sentence, as in the first two examples in 6.61, the first word following
-  the colon is lowercased unless it is a proper noun.
-  When a colon introduces two or more sentences or when it introduces
-  speech in dialog or a quotation or question, the first word following
-  it is capitalized" (from Chicago Manual of Style 6.63, v.17).
-
+- When you use a colon in a sentence, use lowercase for the first word
+  that follows the colon unless it is a proper noun. When the colon
+  introduces two or more sentences, a quotation, or question, capitalize
+  the first word after the colon (from the Chicago Manual of Style 6.63, v17).
 
 Commas
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