Wrong svg:tspan encoding

[valgussev]

Configuration:

• Web browser and its version: Firefox 62, reproduces on others as well
• Operating system and its version: Os X 10.13, reproduces on others as well
• PDF.js version: pdfjs-dist: 2.0.943
• Is a browser extension: no

What is the expected behavior? (add screenshot)
Render text with the right encoding

What went wrong? (add screenshot)
Text being rendered with the wrong encoding in the DOM tree, resulting in a wrong text browser search behaviour (ctrl + F).

<svg:tspan font-family="g_d0_f2" font-size="238.352px" y="0" x="0 132.523712 265.047424 344.41864 503.399424 675.489568 754.860784 887.384496 1019.908208 1152.43192" fill="rgb(0,0,0)"></svg:tspan>

If to open same file with Firefox browser, all the text will be found through browser search

[Snuffleupagus]

Duplicate of #10205.

[valgussev]

Thanks for pointing out!