Why space is created, when use comma and number...

[SeoDongChanReware]

Hello, i'm korean Front-End Developer.
My English is not good, sorry..
please, help my issue.

i use Html2canvas library now.
when use together comma and number, -> create spacing...

1. origin html

• please focus red line
• there no create spacing

2. use html2canvas after, create image

• it is not create spacing, when use comma and number every time
• my thinking is... if mix number 1 and comma, create spacing...

please tell me, why create spacing... and solution