deb-control(5): Add missing escaping to field dashes

debian/changelog

@@ -123,6 +123,7 @@ dpkg (1.16.1) UNRELEASED; urgency=low
     - Rename “USAGE” dselect(1) section to “ACTIONS” and clarify they can
       be performed interactively or from command line.
     - Add missing built-in methods to dselect(1).
+    - Add missing escaping to field dashes in deb-control(5).
 
   [ Bill Allombert]
   * Add support for Build-Features: build-arch. Closes: #229357

man/deb-control.5

@@ -230,14 +230,14 @@ and
 fields.
 .
 .TP
-.BR Built-Using: " <package list>"
+.BR Built\-Using: " <package list>"
 This field lists extra source packages that were used during the build of this
 binary package.  This is an indication to the archive maintenance software that
 these extra source packages must be kept whilst this binary package is
 maintained.  This field must be a list of source package names with strict (=)
 version relationships.  Note that the archive maintenance software is likely to
 refuse to accept an upload which declares a
-.B Built-Using
+.B Built\-Using
 relationship which cannot be satisfied within the archive.
 .
 .SH EXAMPLE