Piece of text treated as separate lines when selected

[jeremypress]

I'm interested to see why PDF.js is interpreting this piece of text as multiple (lined) blocks? It's either a browser text layer issue, or maybe based on PDF.js' adherence to the spec? Here's the extracted data from Brendan's browser:

 /P <</MCID 0>> BDC BT
/F1 12 Tf
1 0 0 1 72.025 708.6 Tm
0 g
0 G
[(w)-3(w)-3(w)-3(.as)-2(ld)5(fkd)4(s)-4(lf)4(k)-2(.c)8(o)-3(m)-2(/lon)12(gh)6(o)-3(r)5(n)] TJ
ET
BT
1 0 0 1 225.05 708.6 Tm
[(-)] TJ
ET
BT
1 0 0 1 228.67 708.6 Tm
[(s)-4(o)-3(lo)-2(r)] TJ
ET
BT
1 0 0 1 253.05 708.6 Tm
[(-)] TJ
ET
BT
1 0 0 1 256.67 708.6 Tm
[(au)4(s)-4(ton?)6(s)-4(tar)7(t)-8(3)] TJ
ET
BT
1 0 0 1 324.45 708.6 Tm
[( )] TJ
ET
 EMC  /P <</MCID 1>> BDC BT
1 0 0 1 72.025 693.97 Tm
[( )] TJ
ET

Attach (recommended) or Link to PDF file here:
download.pdf
^ this PDF was generated by Microsoft Office

Configuration:

• Web browser and its version:
  latest chrome
• Operating system and its version:
  MacOS Sierra
• PDF.js version:
  demo
• Is a browser extension:
  no

Steps to reproduce the problem:

1. Copy the whole line
2. Paste into a text editor, notice that the line is split up into many

What is the expected behavior? (add screenshot)
I would expect a piece of text like this to be captured as one line
What went wrong? (add screenshot)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

[timvandermeij]

I know that there are many other issues like this open in the tracker, so finding a solution for this would probably close many other issues as well. There was an idea that this may happen because we're using div elements instead of e.g., span elements, but it may also just be a bug in the text layer code.

[timvandermeij]

This improved slightly after the fix above. It now copies as:

www.asldfkdslfk.com/longhorn
-solor
-auston?start3

[timvandermeij]

Fixed by #10197.