Don't put spaces around magic generic method annotation comments.

test/comments/generic_methods.unit

+40 columns                              |
+>>> function declaration
+int f/*<S, T>*/(int x) => 3;
+<<<
+int f/*<S, T>*/(int x) => 3;
+>>> type bounds
+int f/*<S extends Set<S>>*/(int x) => 3;
+<<<
+int f/*<S extends Set<S>>*/(int x) => 3;
+>>> method
+class C {
+  static int f/*<S, T>*/(int x) => 3;
+  int m/*<S, T>*/(int x) => 3;
+}
+<<<
+class C {
+  static int f/*<S, T>*/(int x) => 3;
+  int m/*<S, T>*/(int x) => 3;
+}
+>>> function type parameter
+void foo(int f/*<S>*/(int x)) {}
+<<<
+void foo(int f/*<S>*/(int x)) {}
+>>> variable
+var x = /*<S>*/(int x) => x;
+<<<
+var x = /*<S>*/(int x) => x;
+>>> parameter type
+foo/*<S>*/(dynamic/*=S*/ x) => x;
+<<<
+foo/*<S>*/(dynamic/*=S*/ x) => x;
+>>> return type
+dynamic/*=S*/ foo/*<S>*/() => x;
+<<<
+dynamic/*=S*/ foo/*<S>*/() => x;
+>>> without dynamic
+main() {
+  /*=S*/ foo/*<S>*/(/*=S*/ x) {return x;}
+}
+<<<
+main() {
+  /*=S*/ foo/*<S>*/(/*=S*/ x) {
+    return x;
+  }
+}
+>>> var
+void foo/*<S>*/(var /*=S*/ x) {
+  var /*=S*/ y = x;
+}
+<<<
+void foo/*<S>*/(var/*=S*/ x) {
+  var/*=S*/ y = x;
+}