The values following the equals sign in variable assign are all either
a string, an integer, or a boolean. Boolean values may be given as yes/no,
-0/1, true/false or on/off. Case is not significant in boolean values, when
+1/0, true/false or on/off. Case is not significant in boolean values, when
converting value to the canonical form using '--bool' type specifier;
'git config' will ensure that the output is "true" or "false".