dpkg-source(1): Fix indentation of "Extract options (with -x)" title

debian/changelog

@@ -7,6 +7,7 @@ dpkg (1.17.7) UNRELEASED; urgency=low
     - Clarify in deb-control(5) «Multi-Arch: no» field omission.
     - Clarify in dpkg-buildpackage(1) --check-option description.
     - Document dpkg-query --control-path life expectancy. See: #699647
+    - Fix indentation of “Extract options (with -x)” title in dpkg-source(1).
 
   [ Updated dpkg translations ]
   * German (Sven Joachim).

man/dpkg-source.1

@@ -374,6 +374,7 @@ The process fails if the generated diff contains changes to files
 outside of the debian sub-directory. This option is not allowed in
 \fBdebian/source/options\fP but can be used in
 \fBdebian/source/local\-options\fP.
+.PP
 
 .B Extract options (with \-x):