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				@@ -237,7 +237,7 @@ if (typeof PDFJS === 'undefined') { 
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				     'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='; 
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				   window.atob = function (input) { 
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				     input = input.replace(/=+$/, ''); 
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				-    if (input.length % 4 == 1) { 
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				+    if (input.length % 4 === 1) { 
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				       throw new Error('bad atob input'); 
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				     } 
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				     for ( 
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				@@ -293,7 +293,7 @@ if (typeof PDFJS === 'undefined') { 
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				       var dataset = {}; 
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				       for (var j = 0, jj = this.attributes.length; j < jj; j++) { 
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				         var attribute = this.attributes[j]; 
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				-        if (attribute.name.substring(0, 5) != 'data-') { 
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				+        if (attribute.name.substring(0, 5) !== 'data-') { 
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				           continue; 
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				         } 
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				         var key = attribute.name.substring(5).replace(/\-([a-z])/g, 
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				@@ -416,7 +416,7 @@ if (typeof PDFJS === 'undefined') { 
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				   function isDisabled(node) { 
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				     return node.disabled || (node.parentNode && isDisabled(node.parentNode)); 
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				   } 
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				-  if (navigator.userAgent.indexOf('Opera') != -1) { 
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				+  if (navigator.userAgent.indexOf('Opera') !== -1) { 
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				     // use browser detection since we cannot feature-check this bug 
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				     document.addEventListener('click', ignoreIfTargetDisabled, true); 
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				   } 
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