Commits on May 19, 2018

1. Tokenize quoted symbols correctly (Ruby 2.2 style :'_sym+bol') …

   Without the fix, the new test "properly tokenizes symbols" would fail with:
   
   ```
     1) YARD::Parser::Ruby::RubyParser#parse properly tokenizes symbols
        Failure/Error: expect(symbols).to eq %w( :'' :BAR :"B+z" )
   
          expected: [":''", ":BAR", ":\"B+z\""]
               got: [":'", ":BAR", ":B+z"]
   
          (compared using ==)
   ```
   
   which shows that symbols were indeed not reconstructed properly.

   

   cboos committed May 19, 2018
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2. Add support for quoted symbols in ConstantHandler …

   Constants containing quoted symbols can now be documented
   correctly.
   
   Prior to the fix, the value `:"sym+bol"` would be shown as `sym+bol`
   and worse, the empty symbol (`:''`) would have triggered an error in
   MethodHelper#format_constant.

   

   cboos committed May 19, 2018
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3. Fix parsing of constants …

   The sequence `:symbeg`, `:ident` (corresponding to symbols like `:ident`)
   also needs to be taken into account.

   

   cboos committed May 19, 2018
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