Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “banner” role is unnecessary for element “header”.
The first occurrence of ID “views-exposed-form-arsenal-search-arsenal-search” was here.
The first occurrence of ID “edit-search” was here.
The first occurrence of ID “edit-actions” was here.
The first occurrence of ID “edit-submit-arsenal-search” was here.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
The first occurrence of ID “Symbols” was here.
The first occurrence of ID “Tweet” was here.
The first occurrence of ID “M3” was here.
The first occurrence of ID “Name-and-stuff” was here.
The first occurrence of ID “twitter” was here.
The “link” role is unnecessary for element “a”.
The “complementary” role is unnecessary for element “aside”.
The “contentinfo” role is unnecessary for element “footer”.
Unsupported SVG version specified. This validator only supports SVG 1.1. The recommended way to suppress this warning is to remove the “version” attribute altogether.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “Page-1” was here.
The first occurrence of ID “Combined-Shape” was here.
Errors:
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Duplicate ID “views-exposed-form-arsenal-search-arsenal-search”.
Duplicate ID “edit-search”.
Duplicate ID “edit-actions”.
Duplicate ID “edit-submit-arsenal-search”.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Attribute “aria-role” not allowed on element “div” at this point.
The element “header” must not appear as a descendant of the “header” element.
“=” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Duplicate ID “Symbols”.
Duplicate ID “Tweet”.
Duplicate ID “M3”.
Duplicate ID “Name-and-stuff”.
Duplicate ID “twitter”.
The “itemtype” attribute must not be specified on elements that do not have an “itemscope” attribute specified.
Element “figcaption” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
No space between attributes.
Element “p” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
The element “footer” must not appear as a descendant of the “footer” element.
End tag “p” implied, but there were open elements.
Unclosed element “a”.
Attribute “caption_override” not allowed on element “article” at this point.
End tag “div” seen, but there were open elements.
End tag “article” seen, but there were open elements.
No “a” element in scope but a “a” end tag seen.
No “p” element in scope but a “p” end tag seen.
Duplicate ID “Page-1”.
Duplicate ID “Combined-Shape”.
United Kingdom GB