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sqrt - Sqrt: '√val'. Return null if val does not evaluate to a number.
Strings
strCapitalize - Changes first letter of a string to upper case character.
strConcat - String concatenation
strContains - Compares if a val string contains substring
strDecapitalize - Changes first letter of a string to lower case character.
strEndsWith - Compares if a val string ends with substring
strFormat - String format - see `format()`
strLower - Changes all ASCII letters to lower case
strMacro - Str macro pattern which uses the same syntax as `disMacro` and `haystack::Etc.macro`. The macro variables are resolves against the task's variables.
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