readme: Minor style and spacing fix

filbranden · filbranden · commit ba9e3fc488de · 2019-02-15T11:05:04.000-08:00
Fix section header for stable branches and backports. All the other
headings end in a colon and have no blank lines between them and the
body of the section, so fix this one accordingly.
diff --git a/README b/README
@@ -316,8 +316,7 @@ WARNINGS:
         that valgrind generates nice output only on exit(), hence on shutdown
         we don't execve() systemd-shutdown.
 
-STABLE BRANCHES AND BACKPORTS
-
+STABLE BRANCHES AND BACKPORTS:
        Stable branches with backported patches are available in the
        systemd-stable repo at https://github.com/systemd/systemd-stable.
 
