https://bugzilla.wikimedia.org/show_bug.cgi?id=73419

            Bug ID: 73419
           Summary: Math formulas not visible when MathML is enabled.
           Product: Wikipedia App
           Version: Stable
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: Unprioritized
         Component: Android App
          Assignee: wikibugs-l@lists.wikimedia.org
          Reporter: dbr...@wikimedia.org
                CC: bsitzm...@wikimedia.org, dbr...@wikimedia.org,
                    dga...@wikimedia.org, kl...@wikimedia.org,
                    rages...@gmail.com
       Web browser: ---
   Mobile Platform: ---

When a user is logged in, and the user's preferences include displaying math
formulas in MathML (settable in desktop website), the formulas are not shown at
all in the app.

Upon examining the received HTML, the problem seems to be the following:

- The actual MathML is wrapped in a span that has a style of "display: none".

- Next to the MathML, there is a "meta" tag that contains the url for a PNG
fallback image for the formula, but since it's a "meta" tag, it's not rendered
by the WebView.

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