Start systematic improvements of error reporting.

So far, this covers all WARNINGs related to the prologue.

1) hierarchical naming of MANDOCERR_* constants
2) mention the macro name in messages where that adds clarity
3) add one missing MANDOCERR_DATE_MISSING msg
4) fix the wording of one message related to the man(7) prologue

Started on the plane back from Ottawa.

1 files changed, 2 insertions, 2 deletions

diff --git a/mandoc.c b/mandoc.c
index 7ddead57..bc001a61 100644
--- a/mandoc.c
+++ b/mandoc.c
@@ -509,14 +509,14 @@ mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
 
 	if (NULL == in || '\0' == *in ||
 	    0 == strcmp(in, "$" "Mdocdate$")) {
-		mandoc_msg(MANDOCERR_NODATE, parse, ln, pos, NULL);
+		mandoc_msg(MANDOCERR_DATE_MISSING, parse, ln, pos, NULL);
 		time(&t);
 	}
 	else if (a2time(&t, "%Y-%m-%d", in))
 		t = 0;
 	else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
 	    !a2time(&t, "%b %d, %Y", in)) {
-		mandoc_msg(MANDOCERR_BADDATE, parse, ln, pos, NULL);
+		mandoc_msg(MANDOCERR_DATE_BAD, parse, ln, pos, NULL);
 		t = 0;
 	}
 	out = t ? time2a(t) : NULL;