Renaming doc files to make the file names more palatable and in preparation for including documentation in sync process

googlemock/include/gmock/gmock-generated-actions.h

@@ -268,7 +268,7 @@ class ActionHelper {
 // MORE INFORMATION:
 //
 // To learn more about using these macros, please search for 'ACTION' on
-// https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md
+// https://github.com/google/googletest/blob/master/googlemock/docs/cook_book.md
 
 // An internal macro needed for implementing ACTION*().
 #define GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_\

googlemock/include/gmock/gmock-generated-actions.h.pump

@@ -191,7 +191,7 @@ $template
 // MORE INFORMATION:
 //
 // To learn more about using these macros, please search for 'ACTION' on
-// https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md
+// https://github.com/google/googletest/blob/master/googlemock/docs/cook_book.md
 
 $range i 0..n
 $range k 0..n-1

googlemock/include/gmock/gmock-generated-matchers.h

@@ -261,7 +261,7 @@
 //
 // To learn more about using these macros, please search for 'MATCHER'
 // on
-// https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md
+// https://github.com/google/googletest/blob/master/googlemock/docs/cook_book.md
 
 #define MATCHER(name, description)\
   class name##Matcher {\

googlemock/include/gmock/gmock-generated-matchers.h.pump

@@ -263,7 +263,7 @@ $$ }} This line fixes auto-indentation of the following code in Emacs.
 //
 // To learn more about using these macros, please search for 'MATCHER'
 // on
-// https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md
+// https://github.com/google/googletest/blob/master/googlemock/docs/cook_book.md
 
 $range i 0..n
 $for i