RUBY-23469 follow-up: use the second one of the official regexps

plugins/yaml/src/org/jetbrains/yaml/schema/YamlGenericValueAdapter.java

@@ -145,7 +145,7 @@ public class YamlGenericValueAdapter implements JsonValueAdapter {
   private static boolean isFloat(@NotNull String s) {
     if (INFS.contains(trimSign(s)) || NANS.contains(s)) return true;
     if (hasTag(s, "float")) return true;
-    return Pattern.matches("[-+]?[1-9](\\.[0-9]*[1-9])?([eE][-+]?[1-9][0-9]*)?", s);
+    return Pattern.matches("[-+]?(\\.[0-9]+|[0-9]+(\\.[0-9]*)?)([eE][-+]?[0-9]+)?", s);
   }
 
   @NotNull

plugins/yaml/testSrc/org/jetbrains/yaml/schema/YamlByJsonSchemaHighlightingTest.java

@@ -796,10 +796,17 @@ public class YamlByJsonSchemaHighlightingTest extends JsonSchemaHighlightingTest
   public void testTravisPythonVersion() throws Exception {
     @Language("JSON") String schema = FileUtil.loadFile(new File(getTestDataPath() + "/travis.schema.json"));
     doTest(schema, "python: 3.5"); // validates as 'number'
-    doTest(schema, "python: 3.50"); // validates as 'string'
+    doTest(schema, "python: 3.50"); // validates as 'number'
+    doTest(schema, "python: 3.50a"); // validates as 'string'
     doTest(schema, "python: <warning descr=\"Schema validation: Type is not allowed. Expected one of: array, number, string.\">null</warning>");
   }
 
+  public void testTravisNode() throws Exception {
+    @Language("JSON") String schema = FileUtil.loadFile(new File(getTestDataPath() + "/travis.schema.json"));
+    doTest(schema, "node_js: \n" +
+                   "  - <warning descr=\"Schema validation: Type is not allowed. Expected: string.\">2.10</warning>");
+  }
+
   public void testExpNumberNotation() throws Exception {
     doTest("{\n" +
            "  \"properties\": {\n" +