Attached is a suggested rewording of the docstring for org-agenda-prefix-format.
*** /tmp/ediff30654gin 2013-02-18 14:03:46.999849795 +0000 --- /local/data/home/stephen/langs/emacs/elisp-ds/org-mode/lisp/org-agenda.el 2013-02-18 14:02:48.731846974 +0000 *************** *** 1562,1572 **** result in a 12 character time field if a time of the day is specified, but will completely disappear in entries which do not contain a time. ! If there is punctuation or whitespace character just before the final ! format letter, this character will be appended to the field value if ! the value is not empty. For example, the format \"%-12:c\" leads to ! \"Diary: \" if the category is \"Diary\". If the category were be ! empty, no additional colon would be inserted. The default value for the agenda sublist is \" %-12:c%?-12t% s\", which means: --- 1562,1572 ---- result in a 12 character time field if a time of the day is specified, but will completely disappear in entries which do not contain a time. ! If there is punctuation or whitespace character just before the ! final format letter, this character will be appended to the field ! value if the value is not empty. For example, the format ! \"%-12:c\" leads to \"Diary: \" if the category is \"Diary\". If ! the category is empty, no additional colon is inserted. The default value for the agenda sublist is \" %-12:c%?-12t% s\", which means:
