M http.go → http.go

@@ -183,9 +183,10 @@ PageTitle string
 		AuthUser  AuthUser
 		Host      string
 		IsText    bool
+		IsGemini  bool
 		Alert     string
 		Warnings  []string
-	}{fileName, string(fileBytes), c.SiteTitle, user, c.Host, isText, alert, warnings}
+	}{fileName, string(fileBytes), c.SiteTitle, user, c.Host, isText, isGemini(fileName), alert, warnings}
 	err = t.ExecuteTemplate(w, "edit_file.html", data)
 	if err != nil {
 		panic(err)

M templates/edit_file.html → templates/edit_file.html

@@ -11,6 +11,9 @@ {{ . }}
   {{ end }}
   </div>
    {{ if .IsText }}
+   {{ if .IsGemini }}
+   <em>For help with the Gemini markup format, see the <a href="https://admin.flounder.online/gemini_text_guide.gmi">Gemini Text Guide</a></em>
+   {{ end }}
   <textarea rows="27" name="file_text" id="editor">{{.FileText}}</textarea>
   {{ end }}
   <br>