Added test for single quote without a space.

test/formats-test.js

@@ -82,10 +82,10 @@ tape("Handle Newick strings with spaces", function(test) {
    * can read and write Newick strings correctly.
    */
 
-  let nwk = "('Alpha beta', ('Alpha gamma', ('Delta''s epsilon', 'Epsilon zeta ''alphonso''')))";
+  let nwk = "('Alpha beta', ('Alpha gamma', ('Delta''s epsilon', 'Epsilon zeta ''alphonso''', 'test''')))";
   let phylo = new phylotree.phylotree(nwk);
 
-  let test_leaves = ['Alpha beta', 'Alpha gamma', "Delta's epsilon", "Epsilon zeta 'alphonso'"];
+  let test_leaves = ['Alpha beta', 'Alpha gamma', "Delta's epsilon", "Epsilon zeta 'alphonso'", "test'"];
   test_leaves.forEach(function(leaf) {
     let node = phylo.getNodeByName(leaf);
     test.equal(node.data.name, leaf);
@@ -94,7 +94,7 @@ tape("Handle Newick strings with spaces", function(test) {
   // This would be identical to the original Newick string, but phylotree.js coerces
   // lengths to 1 (see https://github.com/veg/phylotree.js/issues/440). So we expect
   // all lengths to be set to 1 on export.
-  test.equal(phylo.getNewick(), "('Alpha beta':1,('Alpha gamma':1,('Delta''s epsilon':1,'Epsilon zeta ''alphonso''':1):1):1):1;");
+  test.equal(phylo.getNewick(), "('Alpha beta':1,('Alpha gamma':1,('Delta''s epsilon':1,'Epsilon zeta ''alphonso''':1,'test''':1):1):1):1;");
 
   test.end();
 });