You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Block_Blast_Unlimited_Coins_Crystals_Generator_Online_2vaqpyz" />
  </query-continue>
  <query>
    <pages>
      <page pageid="890" ns="0" title="BSJ" />
      <page pageid="2053" ns="0" title="Battleground SW" />
      <page pageid="886" ns="0" title="Beam Switch" />
      <page pageid="2259" ns="0" title="Beauty Care Unlimited Rubies Free Codes 39d24s" />
      <page pageid="2091" ns="0" title="Bingo Win Cash cheats iOS Android FREE Cash generator tool" />
      <page pageid="981" ns="0" title="Bioenergy Production" />
      <page pageid="2026" ns="0" title="Bionenergy Production SW" />
      <page pageid="2025" ns="0" title="Biostorage Station SW" />
      <page pageid="2060" ns="0" title="Bitter Well SW" />
      <page pageid="2279" ns="0" title="Blackjack Free Unlimited Chips Generator 19uqa" />
    </pages>
  </query>
</api>