Further clarify restrictions for preconfiguration files

1 files changed, 4 insertions, 2 deletions

diff --git a/en/appendix/preseed.xml b/en/appendix/preseed.xml
index 8940dc27d..2d4a98c5d 100644
--- a/en/appendix/preseed.xml
+++ b/en/appendix/preseed.xml
@@ -599,13 +599,15 @@ There are a few rules to keep in mind when writing a preconfiguration file.
 <itemizedlist>
 <listitem><para>
   Put only a single space or tab between type and value: any additional
-  whitespace will be interpreted as belonging to the value.
+  whitespace will be interpreted as belonging to the value. If you specify
+  an empty value you should still put a single space or tab after the type. 
 </para></listitem>
 <listitem><para>
   A line can be split into multiple lines by appending a backslash
   (<quote><literal>\</literal></quote>) as the line continuation character.
   A good place to split a line is after the question name; a bad place is
-  between type and value.
+  between type and value. Splitting a line inside the value is normally not
+  supported, with the exception of partitioning recipes.
 </para></listitem>
 <listitem><para>
   For debconf variables (templates) used in the installer itself, the