Spurious additional space added between adjacent replacement fields

[edbennett]

This is almost certainly closely related to #220, but when an f-string contains two adjacent replacement fields (e.g. f"{var1}{var2}") then snakefmt will insert a space between them (i.e. f"{var1} {var2}").

Since in general filenames are sensitive to having extra characters inserted, this means that a working rule is broken by this change.

This occurs with Python 3.12 but not Python 3.11.

[mbhall88]

Urgh that is quite nasty. I'll try and get to around to this ASAP

[edbennett]

Thanks! To confirm, #223 correctly fixes the errant behaviour in the case that was causing me issues.