Finish 3.1.1

CONTRIBUTING.md

@@ -28,9 +28,11 @@ This repository uses [Git Flow](https://github.com/nvie/gitflow) to manage devel
   enough, be assured we will eventually add you in there.
 * Do note that in order for us to merge any non-trivial changes (as a rule
   of thumb, additions larger than about 15 lines of code), we need an
-  explicit [public domain dedication][PDD] on record from you.
+  explicit [public domain dedication][PDD] on record from you,
+  which you will be asked to agree to on the first commit to a repo within the organization.
+  Note that the agreement applies to all repos in the [Ruby RDF](https://github.com/ruby-rdf/) organization.
 
 [YARD]:    https://yardoc.org/
 [YARD-GS]: https://rubydoc.info/docs/yard/file/docs/GettingStarted.md
-[PDD]:     https://lists.w3.org/Archives/Public/public-rdf-ruby/2010May/0013.html
-[pr]:      https://github.com/ruby-rdf/rdf-aggregate-repo/compare/
+[PDD]:              https://unlicense.org/#unlicensing-contributions
+[pr]:      https://github.com/ruby-rdf/rdf/compare/

README.md

@@ -44,7 +44,9 @@ This repository uses [Git Flow](https://github.com/nvie/gitflow) to mange develo
   enough, be assured we will eventually add you in there.
 * Do note that in order for us to merge any non-trivial changes (as a rule
   of thumb, additions larger than about 15 lines of code), we need an
-  explicit [public domain dedication][PDD] on record from you.
+  explicit [public domain dedication][PDD] on record from you,
+  which you will be asked to agree to on the first commit to a repo within the organization.
+  Note that the agreement applies to all repos in the [Ruby RDF](https://github.com/ruby-rdf/) organization.
 
 ## License
 
@@ -54,4 +56,4 @@ see <https://unlicense.org/> or the accompanying {file:UNLICENSE} file.
 [RDF.rb]:           https://ruby-rdf.github.com/
 [YARD]:             https://yardoc.org/
 [YARD-GS]:          https://rubydoc.info/docs/yard/file/docs/GettingStarted.md
-[PDD]:              https://lists.w3.org/Archives/Public/public-rdf-ruby/2010May/0013.html
+[PDD]:              https://unlicense.org/#unlicensing-contributions

VERSION

@@ -1 +1 @@
-3.1.0
+3.1.1

etc/doap.ttl

@@ -8,7 +8,7 @@
 @prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .
 
 <> a doap:Project ;
-  doap:name          "RDF::N3" ;
+  doap:name          "RDF::OrderedRepo" ;
   doap:homepage      <https://github.com/ruby-rdf/rdf-ordered-repo> ;
   doap:license       <https://unlicense.org/1.0/> ;
   doap:shortdesc     "An order-preserving repository for RDF.rb."@en ;

lib/rdf/ordered_repo.rb

@@ -280,7 +280,7 @@ def delete_from(data, statement)
         g = DEFAULT_GRAPH unless supports?(:graph_name)
         g ||= DEFAULT_GRAPH
 
-        os   = data[g][s][p].dup.delete(o)
+        os   = data[g][s][p].dup.delete_if {|k,v| k == o}
         ps   = os.empty? ? data[g][s].dup.delete_if {|k,v| k == p} : data[g][s].merge(p => os)
         ss   = ps.empty? ? data[g].dup.delete_if    {|k,v| k == s} : data[g].merge(s => ps)
         return ss.empty? ? data.dup.delete_if       {|k,v| k == g} : data.merge(g => ss)