sh filetype: do not highlight an empty array as a function

`x=` and `x+=` should not be highlighted as a function.
```
x=()
x+=()
```
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throwawayaccount12345-1 2021-11-18 13:51:53 -03:00 committed by GitHub
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commit 2a3509e560
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@ -61,7 +61,7 @@ evaluate-commands %sh{
add-highlighter shared/sh/code/operators regex [\[\]\(\)&|]{1,2} 0:operator add-highlighter shared/sh/code/operators regex [\[\]\(\)&|]{1,2} 0:operator
add-highlighter shared/sh/code/variable regex ((?<![-:])\b\w+)= 1:variable add-highlighter shared/sh/code/variable regex ((?<![-:])\b\w+)= 1:variable
add-highlighter shared/sh/code/alias regex \balias(\h+[-+]\w)*\h+([\w-.]+)= 2:variable add-highlighter shared/sh/code/alias regex \balias(\h+[-+]\w)*\h+([\w-.]+)= 2:variable
add-highlighter shared/sh/code/function regex ^\h*(\S+)\h*\(\) 1:function add-highlighter shared/sh/code/function regex ^\h*(\S+(?<!=))\h*\(\) 1:function
add-highlighter shared/sh/code/unscoped_expansion regex (?<!\\)(?:\\\\)*\K\$(\w+|#|@|\?|\$|!|-|\*) 0:value add-highlighter shared/sh/code/unscoped_expansion regex (?<!\\)(?:\\\\)*\K\$(\w+|#|@|\?|\$|!|-|\*) 0:value
add-highlighter shared/sh/double_string/expansion regex (?<!\\)(?:\\\\)*\K\$(\w+|#|@|\?|\$|!|-|\*|\{.+?\}) 0:value add-highlighter shared/sh/double_string/expansion regex (?<!\\)(?:\\\\)*\K\$(\w+|#|@|\?|\$|!|-|\*|\{.+?\}) 0:value