Add .yardopts
Add root .c file for YARD
Update documentation
Update handling of taint and untrust
Document %a and %A directives to U::String#%
Remove superfluous aliases
Fix documentation of aliases
Fix order of methods so that document is easier to read
Use #to_sym instead of Symbol for param type
Use #to_int instead of Integer for parameter types
Remove stale tests
Wrap rb_obj_is_kind_of() in RTEST()
Add missing newline
Fix documentation generation so that order is preserved
Rename #type to #category
Add U::String#match
Add U::String#sub
Make #center, #ljust, and #rjust use #width, not #length, as specified
Use width instead of length for %c, %s, and %p
Use better error for wrong errors in #match