capitalize extension logic is wrong

[maheshmnj]

Describe the bug The logic to capitalize a string is wrong

Actual Results

String x= "hello";
x.capitalize(); /// returnsHello

Expected Results

String x= "hEllo";
x.capitalize(); /// returns Hello

Additional context: This can be seen in the app when adding a synonym if user enters "hEllO" on submitting "HEllO" is submitted

[maheshmnj]

fixed in https://github.com/maheshmnj/vocabhub/commit/bab033a7207ab2cf83c14cc6905cb9ec0bc749d5