Problem: The following strchar functions have incorrect types:
strcharlen() - Currently any. Always returns an integer, including on
error
strcharpart() - The skipcc annotation does not specify that 0 and 1 are
valid. These inputs are required for vimscript usage. The current
return type is any, even though the function returns an empty string
on error
strchars() - The skipcc annotation does not specify that 0 and 1 are
valid
Solution: Update the problem types.
6cb3254c2f