man: Turn the u-a(1) --query example item into a sub-section

This makes it more clear that this is not another field, but an entire
sub-section of its own.

debian/changelog

@@ -18,6 +18,7 @@ dpkg (1.18.11) UNRELEASED; urgency=medium
     - Add version when "new" substvars were introduced in deb-substvars(5).
     - Switch deb-triggers(5) types into a proper list.
     - Itemize --log format entries in dpkg(1).
+    - Turn the update-alternatives(1) --query example item into a sub-section.
   * Build system:
     - Add support for profiling perl modules.
     - Clean up compiler and linker automatic flag usage in configure.

man/update-alternatives.1

@@ -441,8 +441,7 @@ associated to the master link of the alternative. There is one slave per
 line. Each line contains one space, the generic name of the slave
 alternative, another space, and the path to the slave alternative.
 .
-.TP
-.BR Example
+.SS Example
 .nf
 $ update\-alternatives \-\-query editor
 Name: editor