When using a comma as thousands separator in tex, one should wrap it in braces to avoid a spurious space after it (http://www.tex.ac.uk/FAQ-dec_comma.html). See below the difference between "$1{,}234{,}567" and "1,234,567$" with text.usetext=True.
Unfortunately, mathtext doesn't implement this detail (text.usetex=False).
(It doesn't look that bad on these zoomed images but I think the difference is more visible if you draw them e.g. using xlabel.)
(Yes, this qualifies as a major nitpick.)
When using a comma as thousands separator in tex, one should wrap it in braces to avoid a spurious space after it (http://www.tex.ac.uk/FAQ-dec_comma.html). See below the difference between
"$1{,}234{,}567"and"1,234,567$"withtext.usetext=True.Unfortunately, mathtext doesn't implement this detail (
text.usetex=False).(It doesn't look that bad on these zoomed images but I think the difference is more visible if you draw them e.g. using
xlabel.)(Yes, this qualifies as a major nitpick.)