The line number isn't always aligned with the source code

[藍挺瑋]

I found the problem on my cgit site: 
https://www.tfcis.org/~lantw44/cgit/configfile/tree/README?h=bash_include-20160928

I attached three screenshots in this message. Firefox and Chromium are
unable to keep the line number and the source code aligned, but
Epiphany can.

The default monospace font on my system is 'DejaVu Sans Mono'. Since
DejaVu fonts don't include Chinese characters required to show the
page, the browser picks 'Source Han Sans TW' as the secondary font,
which has different height with DejaVu, causing line number to be
misaligned. Is there a way to fix the problem and make it work on all
browsers?
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