https://manpages.ubuntu.com/manpages/xenial/man3/Tcl_UniCharAtIndex.3tcl.html
Ubuntu Manpage: Tcl_UniChar, Tcl_UniCharCaseMatch, Tcl_UniCharNcasecmp,
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https://manpages.ubuntu.com/manpages/xenial/man3/Tcl_UniCharCaseMatch.3tcl.html
Ubuntu Manpage: Tcl_UniChar, Tcl_UniCharCaseMatch, Tcl_UniCharNcasecmp,
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https://manpages.ubuntu.com/manpages/xenial/man3/Tcl_NumUtfChars.3tcl.html
Ubuntu Manpage: Tcl_UniChar, Tcl_UniCharCaseMatch, Tcl_UniCharNcasecmp,
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https://manpages.ubuntu.com/manpages/xenial/man3/Tcl_UtfToUniCharDString.3tcl.html
Ubuntu Manpage: Tcl_UniChar, Tcl_UniCharCaseMatch, Tcl_UniCharNcasecmp,
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