bug(deeplinking): escaping breaks whitespaces & underscored tags/ids (via #4953)

* add tests for operation lacking an operationId
* add deep linking tests for tags/operationIds with underscores
* migrate from `_` to `%20` for deeplink hash whitespace escaping
* add backwards compatibility for `_` whitespace escaping
* update util unit tests

test/core/utils.js

@@ -991,12 +991,12 @@ describe("utils", function() {
   describe("createDeepLinkPath", function() {
     it("creates a deep link path replacing spaces with underscores", function() {
       const result = createDeepLinkPath("tag id with spaces")
-      expect(result).toEqual("tag_id_with_spaces")
+      expect(result).toEqual("tag%20id%20with%20spaces")
     })
 
     it("trims input when creating a deep link path", function() {
       let result = createDeepLinkPath("  spaces before and after    ")
-      expect(result).toEqual("spaces_before_and_after")
+      expect(result).toEqual("spaces%20before%20and%20after")
 
       result = createDeepLinkPath("  ")
       expect(result).toEqual("")
@@ -1036,6 +1036,16 @@ describe("utils", function() {
       const result = escapeDeepLinkPath("hello#world")
       expect(result).toEqual("hello\\#world")
     })
+
+    it("escapes a deep link path with a space", function() {
+      const result = escapeDeepLinkPath("hello world")
+      expect(result).toEqual("hello_world")
+    })
+
+    it("escapes a deep link path with a percent-encoded space", function() {
+      const result = escapeDeepLinkPath("hello%20world")
+      expect(result).toEqual("hello_world")
+    })
   })
 
   describe("getExtensions", function() {