camelCase output not as expected

[yelaissaoui]

Describe the bug
The function camelCase renders a different output. The capital characters in the middle of the words are not lowered.
Eg : "foo BAR baz!" becomes "FooBARBaz".

To Reproduce
Use camelCaseLower in a template, give it a value with capital letter in the middle of the words.

Expected behavior
"foo BAR baz!" becomes "FooBarBaz". No capital characters in the middle of the words.