5c9dc83bb909a07e830f0364ba65e0fe0d59b230
It seems Vim needs to be instructed how to scan for the begining of the multiline statements to correctly and efficiently highlight lanuages. See :help syn-sync-maxlines
Description
Languages
Nix
96.3%
Shell
1.8%
Python
0.7%
Perl
0.4%
C
0.3%
Other
0.1%