org.el (org-adapt-indentation): Slightly improve the docstring.

Make it clear that "a line starting a column 0" means a line starting
with some text at column 0.

lisp/ChangeLog

@@ -1,5 +1,7 @@
 2009-08-02  Bastien Guerry  <bzg@altern.org>
 
+	* org.el (org-adapt-indentation): Slightly improve the docstring.
+
 	* org-exp.el (org-export-as-org): Use file-source.org format
 	instead of file.org-source.
 

lisp/org.el

@@ -688,7 +688,8 @@ lines to the buffer:
 When this is set and the *entire* text in an entry is indented, the
 indentation is increased by one space in a demotion command, and
 decreased by one in a promotion command.  If any line in the entry
-body starts at column 0, indentation is not changed at all.
+body starts with some text at column 0, indentation is not changed 
+at all.
 
 This variable also influences how property drawers and planning
 information is inserted.  When t, these lines drawers will be inserted