mdocVersionCompare
Version comparison method for mdoc versions.
This compares mdoc version strings and returns a negative number if the first version is considered less than the second version, 0 if they are considered equal, and positive otherwise.
For example, called with mdocVersionCompare("1.0", "1.1") will return a negative number.
Return
a positive number, negative number, or 0.
Parameters
a
a version string, for example "1.0"
b
another version string, for example "1.1"