Added octal formatting fo `fmt` functions. (#5867)
Added octal formatting fo `fmt` functions. (#5867)

* Added octal formatting (specifier "o") to `formatIntValue` function.
* Added octal specifier test case in `fmt.zig` (under the "int.specifier" case)
zig-lang/zig,raulgrell/zig,andrewrk/zig,zig-lang/zig,raulgrell/zig,zig-lang/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig