clarifying AP style

Author: norareidy

source/style-guide/quickstart.txt

@@ -86,10 +86,10 @@ the following ones to help you boost the effectiveness of your writing.
      - :ref:`use-correct-punctuation`
 
        :ref:`punctuation`
-   * - **Use headline-style capitalization for all titles and
+   * - **Use AP headline-style capitalization for all titles and
        headings**.
 
-       To meet headline-style (or title case) capitalization requirements, 
+       To meet AP headline-style (or AP title case) capitalization requirements, 
        capitalize the initial letter of every word in a phrase except for 
        articles, coordinating conjunctions, prepositions, and the types of words 
        outlined in the :ref:`titles-and-headings` guide.

source/style-guide/style/titles-and-headings.txt

@@ -16,7 +16,7 @@ documentation.
 Capitalization
 --------------
 
-- Use *headline-style* capitalization for most titles and headings,
+- Use *AP headline-style* capitalization for most titles and headings,
   including article, chapter, table, figure, and example titles, as
   well as section and procedure headings.
 
@@ -28,7 +28,7 @@ Capitalization
 Guidelines for Headline-Style Capitalization
 --------------------------------------------
 
-Headline-style capitalization uses initial uppercase letters for the
+AP headline-style capitalization uses initial uppercase letters for the
 first, last, and all the significant words in the title.
 
 Capitalize all words in the title except for the following types of