Fix: extra empty line if SCHEDULED and DEADLINE exist

Fix https://github.com/logseq/logseq/issues/2506
This issue was also mentioned in
https://discuss.logseq.com/t/formatting-of-scheduled-items/1756/2

This PR offers an in-elegant way to remove the break_line element
following a timestamp element. I suppose this should be resolved in the
mldoc side. Anyway, this PR can be treated as a solution.

src/main/frontend/format/block.cljs

@@ -739,6 +739,22 @@
   (and (= typ "Paragraph")
        (every? #(= % ["Break_Line"]) break-lines)))
 
+(defn trim-paragraph-special-break-lines
+  [[typ paras]]
+  (println typ paras)
+  (when (= typ "Paragraph")
+    (let [indexed-paras (map-indexed vector paras)
+          ast [typ (->> (filter
+                         #(let [[index value] %]
+                            (not (and (> index 0)
+                                      (= value ["Break_Line"])
+                                      (contains? #{"Timestamp" "Macro"}
+                                                 (first (nth paras (dec index)))))))
+                         indexed-paras)
+                        (map #(last %)))]]
+      ast)))
+
 (defn trim-break-lines!
   [ast]
-  (drop-while break-line-paragraph? ast))
+  (drop-while break-line-paragraph?
+              (map trim-paragraph-special-break-lines ast)))