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Baseline
String.capitalize()
Returns the referenced string, transforming the initial letter of each word to a capital letter and leaving all other characters unchanged.
The function can be chained both to string data and to string literals:
$MyString.capitalize()
"my new title".capitalize()
The latter gives "My New Title".
The trailing parentheses may be omitted:
$MyString.capitalize
If 'title case' is required from a mixed case string, chain with .lowercase():
"my nEW title".lowercase.capitalize ("My New Title")
Bear in mind the latter won't deal with all capital acronyms (UPS, UNHCR) or CamelCase words (AstroTurf, FedEx).
Functionally equivalent to capitalize().