(fix)capture: respect blank lines in capture templates (#2203)

org-roam-capture.el

@@ -788,7 +788,7 @@ When ENSURE-NEWLINE, always ensure there's a newline behind."
     ;; template does not start with any whitespace, and only ends with a single newline
     ;;
     ;; Instead, we restore the whitespace in the original template.
-    (setq template (replace-regexp-in-string "\n$" "" (org-capture-fill-template template)))
+    (setq template (replace-regexp-in-string "[\n]*\\'" "" (org-capture-fill-template template)))
     (when (and ensure-newline
                (string-equal template-whitespace-content ""))
       (setq template-whitespace-content "\n"))

tests/test-org-roam-capture.el

@@ -48,6 +48,11 @@
      (org-roam-capture--fill-template "foo\n\t\n")
      :to-equal "foo\n\t\n"))
 
+  (it "fills template without deleting newlines in its body"
+    (expect
+     (org-roam-capture--fill-template "foo\n\n\nbar\n\n")
+     :to-equal "foo\n\n\nbar\n\n"))
+
   (it "expands templates when it's a function"
     (expect
      (org-roam-capture--fill-template (lambda () "foo"))