style: fix the spacing of the changes entries

Author: nedbat

CHANGES.rst

@@ -209,6 +209,7 @@ Version 7.1.0 — 2023-01-24
 .. _issue 1319: https://github.com/nedbat/coveragepy/issues/1319
 .. _issue 1538: https://github.com/nedbat/coveragepy/issues/1538
 
+
 .. _changes_7-0-5:
 
 Version 7.0.5 — 2023-01-10
@@ -422,7 +423,6 @@ update your settings.
 .. _pull 1479: https://github.com/nedbat/coveragepy/pull/1479
 
 
-
 .. _changes_6-6-0b1:
 
 Version 6.6.0b1 — 2022-10-31
@@ -1132,6 +1132,7 @@ Version 5.3.1 — 2020-12-19
 .. _issue 1010: https://github.com/nedbat/coveragepy/issues/1010
 .. _pull request 1066: https://github.com/nedbat/coveragepy/pull/1066
 
+
 .. _changes_53:
 
 Version 5.3 — 2020-09-13