Fix summary resynthesis for operators ending in '='.

pkg/analyzer/test/src/summary/summary_test.dart

Index: pkg/analyzer/test/src/summary/summary_test.dart
diff --git a/pkg/analyzer/test/src/summary/summary_test.dart b/pkg/analyzer/test/src/summary/summary_test.dart
index d04200ef85ed439fc21a65826ce63fd74bc235c6..7346094d429090269328c2851b1979d355cfe7b8 100644
--- a/pkg/analyzer/test/src/summary/summary_test.dart
+++ b/pkg/analyzer/test/src/summary/summary_test.dart
@@ -1286,6 +1286,13 @@ typedef F();
     expect(executable.isExternal, false);
   }
 
+  test_executable_operator_equal() {
+    UnlinkedExecutable executable =
+        serializeClassText('class C { bool operator==(C other) => false; }')
+            .executables[0];
+    expect(executable.name, '==');
+  }
+
   test_executable_operator_external() {
     UnlinkedExecutable executable =
         serializeClassText('class C { external C operator+(C c); }')
@@ -1293,6 +1300,13 @@ typedef F();
     expect(executable.isExternal, true);
   }
 
+  test_executable_operator_greater_equal() {
+    UnlinkedExecutable executable =
+        serializeClassText('class C { bool operator>=(C other) => false; }')
+            .executables[0];
+    expect(executable.name, '>=');
+  }
+
   test_executable_operator_index() {
     UnlinkedExecutable executable =
         serializeClassText('class C { bool operator[](int i) => null; }')
@@ -1324,6 +1338,13 @@ typedef F();
     expect(executable.typeParameters, isEmpty);
   }
 
+  test_executable_operator_less_equal() {
+    UnlinkedExecutable executable =
+        serializeClassText('class C { bool operator<=(C other) => false; }')
+            .executables[0];
+    expect(executable.name, '<=');
+  }
+
   test_executable_param_function_typed() {
     UnlinkedExecutable executable = serializeExecutableText('f(g()) {}');
     expect(executable.parameters[0].isFunctionTyped, isTrue);