Fix NEWS file format

  - missing end of section header

DESCRIPTION

 Package: splatter
 Type: Package
 Title: Simple Simulation of Single-cell RNA Sequencing Data
-Version: 1.9.11
+Version: 1.9.12
 Date: 2019-10-20
 Authors@R:
     c(person("Luke", "Zappia", role = c("aut", "cre"),

inst/NEWS.Rd

@@ -17,7 +17,9 @@
     function.}
     \item{Tidy and improve estimation function examples and add checks for
     suggested packages.}
-    \item{Various fixes for compatibility with updates to other packages.}
+    \item{Various fixes for compatibility with updates to other
+      packages.}
+    }
 }
 
 \section{Version 1.8.0, Bioconductor 3.9 Release (2019-04-18)}{