Remove String#toCharArray from ScriptUtils
ScriptUtils contains two calls to String#toCharArray for the sole purpose to iterating over all chars in a String. Not only is this unnecessary and can be replaced with String#charAt it also causes additional allocator and heap pressure because String#toCharArray rather than returning the backing array (which is gone in Java 9) creates a copy. This commit contains the following changes: - remove String#toCharArray from ScriptUtils and replace with String#charAt Issue: SPR-15075
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