Fix stray end p tag in Obsidian callout titles

Also remove test references to deprecated funcs now in ERROR.

Closes #12828

markup/goldmark/blockquotes/blockquotes.go

@@ -164,10 +164,12 @@ var blockQuoteAlertRe = regexp.MustCompile(`^<p>\[!([a-zA-Z]+)\](-|\+)?[^\S\r\n]
 func resolveBlockQuoteAlert(s string) blockQuoteAlert {
 	m := blockQuoteAlertRe.FindStringSubmatch(s)
 	if len(m) == 4 {
+		title := strings.TrimSpace(m[3])
+		title = strings.TrimRight(title, "</p>")
 		return blockQuoteAlert{
 			typ:   strings.ToLower(m[1]),
 			sign:  m[2],
-			title: m[3],
+			title: title,
 		}
 	}
 

markup/goldmark/blockquotes/blockquotes_integration_test.go

@@ -123,7 +123,6 @@ title: "Home"
 > [!danger]
 > Do not approach or handle without protective gear.
 
-
 > [!tip] Callouts can have custom titles
 > Like this one.
 
@@ -135,6 +134,10 @@ title: "Home"
 > [!faq]+ Foldable callout
 > Yes! In a foldable callout, the contents are hidden when the callout is collapsed
 
+> [!info] Can callouts be nested?
+> > [!important] Yes!, they can.
+> > > [!tip] You can even use multiple layers of nesting.
+
 -- layouts/index.html --
 {{ .Content }}
 -- layouts/_default/_markup/render-blockquote.html --
@@ -145,9 +148,11 @@ AlertType: {{ .AlertType }}|AlertTitle: {{ .AlertTitle }}|AlertSign: {{ .AlertSi
 	b := hugolib.Test(t, files)
 	b.AssertFileContentExact("public/index.html",
 		"AlertType: tip|AlertTitle: Callouts can have custom titles|AlertSign: |",
-		"AlertType: tip|AlertTitle: Title-only callout</p>|AlertSign: |",
-		"AlertType: faq|AlertTitle: Foldable negated callout|AlertSign: -|Text: <p>Yes!",
-		"AlertType: faq|AlertTitle: Foldable callout|AlertSign: +|",
+		"AlertType: tip|AlertTitle: Title-only callout|AlertSign: |",
+		"AlertType: faq|AlertTitle: Foldable negated callout|AlertSign: -|Text: <p>Yes! In a foldable callout, the contents are hidden when the callout is collapsed</p>\n|",
+		"AlertType: faq|AlertTitle: Foldable callout|AlertSign: +|Text: <p>Yes! In a foldable callout, the contents are hidden when the callout is collapsed</p>\n|",
 		"AlertType: danger|AlertTitle: |AlertSign: |Text: <p>Do not approach or handle without protective gear.</p>\n|",
+		"AlertTitle: Can callouts be nested?|",
+		"AlertTitle: You can even use multiple layers of nesting.|",
 	)
 }

markup/goldmark/blockquotes/blockquotes_test.go

@@ -63,6 +63,6 @@ func TestResolveBlockQuoteAlert(t *testing.T) {
 	}
 
 	for i, test := range tests {
-		c.Assert(resolveBlockQuoteAlert("<p>"+test.input), qt.Equals, test.expected, qt.Commentf("Test %d", i))
+		c.Assert(resolveBlockQuoteAlert("<p>"+test.input+"</p>"), qt.Equals, test.expected, qt.Commentf("Test %d", i))
 	}
 }