emacs: fix off-by-one error in notmuch-hello column alignment

Expected results for few tests are fixed, the relevant test is
unmarked broken.

emacs/notmuch-hello.el

@@ -461,7 +461,7 @@ Such a list can be computed with `notmuch-hello-query-counts'."
 		  ;; just insert `(- widest (length name))' spaces - the
 		  ;; column separator is included in the button if
 		  ;; `(equal widest (length name)'.
-		  (widget-insert (make-string (max 1
+		  (widget-insert (make-string (max 0
 						   (- widest (length name)))
 					      ? )))))
 	    (setq count (1+ count))

test/emacs-hello

@@ -45,7 +45,6 @@ test_emacs "(let ((notmuch-hello-sections
 test_expect_equal_file OUTPUT $EXPECTED/notmuch-hello-section-counts
 
 test_begin_subtest "Column alignment for tag/queries with long names"
-test_subtest_known_broken
 tag=a-very-long-tag # length carefully calculated for 80 characters window width
 notmuch tag +$tag '*'
 test_emacs '(notmuch-hello)