Correct format of ChangeLog entry

Author: waltersom

ChangeLog

@@ -22,8 +22,8 @@
 	* inst/include/Rcpp/DataFrame.h: Implement explict push_back and
 	push_front for DataFrame, which takes care to set the class and
 	row.names attributes.
-	* inst/tinyTest/test_dataframe.R Add in tests for push_back/push_front
-	* inst/tinyTest/cpp/DataFrame.cpp
+	* inst/tinyTest/test_dataframe.R: Add in tests for push_back/push_front
+	* inst/tinyTest/cpp/DataFrame.cpp: Idem
 
 2020-06-27  Dirk Eddelbuettel  <[email protected]>