Fix printing TSTypeOperator (#12114)

packages/babel-generator/src/generators/typescript.js

@@ -317,7 +317,7 @@ export function TSParenthesizedType(node) {
 }
 
 export function TSTypeOperator(node) {
-  this.token(node.operator);
+  this.word(node.operator);
   this.space();
   this.print(node.typeAnnotation, node);
 }

packages/babel-generator/test/fixtures/typescript/types-mapped-compact/input.js

@@ -0,0 +1,5 @@
+let map1: { [P in string]: number };
+let map2: { readonly [P in string]?: number };
+let map3: { +readonly [P in string]+?: number };
+let map4: { -readonly [P in string]-?: number };
+let map5: { [P in keyof Q]: number };

packages/babel-generator/test/fixtures/typescript/types-mapped-compact/options.json

@@ -0,0 +1,5 @@
+{
+  "compact": true,
+  "sourceType": "module",
+  "plugins": ["typescript"]
+}

packages/babel-generator/test/fixtures/typescript/types-mapped/input.js

@@ -2,3 +2,4 @@ let map1: { [P in string]: number };
 let map2: { readonly [P in string]?: number };
 let map3: { +readonly [P in string]+?: number };
 let map4: { -readonly [P in string]-?: number };
+let map5: { [P in keyof Q]: number };

packages/babel-generator/test/fixtures/typescript/types-mapped/output.js

@@ -1,4 +1,5 @@
 let map1: { [P in string]: number };
 let map2: { readonly [P in string]?: number };
 let map3: { +readonly [P in string]+?: number };
-let map4: { -readonly [P in string]-?: number };
+let map4: { -readonly [P in string]-?: number };
+let map5: { [P in keyof Q]: number };