[fish] Fix compatibility with v3.1.2 - v3.3.1 #4200
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Don't use the command substitution syntax: $(cmd)
Fix #4196
I tested this change with versions 3.3.1, 3.1.2, and 3.0.2.
The first two work but the last has issues: The
stringcommand doesn't have thecollectsubcommand (was added in v3.1b1), andcddoesn't have the--switch (couldn't find the the version that was added).Version 3.1.1 had broken
eval. The remaining versions 3.1.0 and 3.1b1, may or may not work.So, the oldest tested working version is 3.1.2.