reformatting last section of NEWS file

the bullets weren't displaying correctly
diff --git a/inst/NEWS.md b/inst/NEWS.md
index a29a83b..30a60d4 100644
--- a/inst/NEWS.md
+++ b/inst/NEWS.md
@@ -1,8 +1,8 @@
 kableExtra 0.7.0
+--------------------------------------------------------------------------------
 * Now HTML table will be previewed in Viewer panel
 * Added HTML color code support to kableExtra
-* Added footnote as a more flexible replacement for add_footnote. Add_footnote 
-will be kept maintained for a while. 
+* Added footnote as a more flexible replacement for add_footnote. `Add_footnote()` will be kept maintained for a while. 
 * Fixed bug #105: bold/italic/monospace cannot accept T/F as vector
 * Added extra_css to cell_spec, row_spec & column_spec
 * Fixed bug #88: add_footnote doesn't support full width
@@ -17,8 +17,6 @@
 * Quite a few minor bug fixes
 
 
-
-
 kableExtra 0.6.1
 --------------------------------------------------------------------------------
 * Fixed a bug in column_spec width introduced in ver 0.6.0