Fix summary resynthesis for operators ending in '='.

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

Index: pkg/analyzer/test/src/summary/resynthesize_test.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_test.dart b/pkg/analyzer/test/src/summary/resynthesize_test.dart
index 307b104b678df6e164e8fb5c4bb3377c6733d3b0..f979b8d83fac8a4adb8baf965b5fabce5b1213fd 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_test.dart
@@ -798,10 +798,18 @@ class E {
     checkLibrary('class C { C operator+(C other) => null; }');
   }
 
+  test_operator_equal() {
+    checkLibrary('class C { bool operator==(C other) => false; }');
+  }
+
   test_operator_external() {
     checkLibrary('class C { external C operator+(C other); }');
   }
 
+  test_operator_greater_equal() {
+    checkLibrary('class C { bool operator>=(C other) => false; }');
+  }
+
   test_operator_index() {
     checkLibrary('class C { bool operator[](int i) => null; }');
   }
@@ -810,6 +818,10 @@ class E {
     checkLibrary('class C { void operator[]=(int i, bool v) {} }');
   }
 
+  test_operator_less_equal() {
+    checkLibrary('class C { bool operator<=(C other) => false; }');
+  }
+
   test_parts() {
     addNamedSource('/a.dart', 'part of my.lib;');
     addNamedSource('/b.dart', 'part of my.lib;');