fix: Expect , in :custom(msg, query)

[jawoznia]

This check was missed in tests. Found it while updating the sylvia book.

[codecov]

Codecov Report

Merging #250 (a918239) into main (cb15d56) will increase coverage by 0.02%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main     #250      +/-   ##
==========================================
+ Coverage   87.72%   87.74%   +0.02%     
==========================================
  Files          24       24              
  Lines        1303     1306       +3     
==========================================
+ Hits         1143     1146       +3     
  Misses        160      160              

Files	Coverage Δ
sylvia-derive/src/parser.rs	84.26% <66.66%> (-0.28%)	⬇️

... and 1 file with indirect coverage changes

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[hashedone]

Uhh, so before there was no comma between query=... and msg...? Good catch, good it's fixed.

[jawoznia]

Uhh, so before there was no comma between query=... and msg...? Good catch, good it's fixed.

Unfortunately. I missed this check earlier.