Prevent NPE when viewing non-rendered files (#18234)

Fix #18231

Signed-off-by: Andrew Thornton <art27@cantab.net>

templates/repo/unicode_escape_prompt.tmpl

@@ -1,17 +1,19 @@
-{{if .EscapeStatus.BadBIDI}}
+{{if .EscapeStatus}}
-<div class="ui error message unicode-escape-prompt">
+	{{if .EscapeStatus.BadBIDI}}
-	<span class="close icon hide-panel button" data-panel-closest=".message">{{svg "octicon-x" 16 "close inside"}}</span>
+		<div class="ui error message unicode-escape-prompt">
-	<div class="header">
+			<span class="close icon hide-panel button" data-panel-closest=".message">{{svg "octicon-x" 16 "close inside"}}</span>
-		{{$.root.i18n.Tr "repo.bidi_bad_header"}}
+			<div class="header">
-	</div>
+				{{$.root.i18n.Tr "repo.bidi_bad_header"}}
-	<p>{{$.root.i18n.Tr "repo.bidi_bad_description" | Str2html}}</p>
+			</div>
-</div>
+			<p>{{$.root.i18n.Tr "repo.bidi_bad_description" | Str2html}}</p>
-{{else if .EscapeStatus.Escaped}}
+		</div>
-<div class="ui warning message unicode-escape-prompt">
+	{{else if .EscapeStatus.Escaped}}
-	<span class="close icon hide-panel button" data-panel-closest=".message">{{svg "octicon-x" 16 "close inside"}}</span>
+		<div class="ui warning message unicode-escape-prompt">
-	<div class="header">
+			<span class="close icon hide-panel button" data-panel-closest=".message">{{svg "octicon-x" 16 "close inside"}}</span>
-		{{$.root.i18n.Tr "repo.unicode_header"}}
+			<div class="header">
-	</div>
+				{{$.root.i18n.Tr "repo.unicode_header"}}
-	<p>{{$.root.i18n.Tr "repo.unicode_description" | Str2html}}</p>
+			</div>
-</div>
+			<p>{{$.root.i18n.Tr "repo.unicode_description" | Str2html}}</p>
+		</div>
+	{{end}}
 {{end}}