Merge pull request #7590 from electron/docs-cleanup

Cleanup docs and standardize structs

diff --cc docs/api/app.md
index 2da6428943475038bdff698c37b6106bb5f3e302,befe4a1adea38e89671fb509850b94b34fccd2c8..9dc1259334f026e4a9bb5ca2a23c1aea992b17b4
--- 1/docs/api/app.md
--- 2/docs/api/app.md
+++ b/docs/api/app.md
@@@ -184,16 -184,8 +184,9 @@@ Returns
  * `webContents` [WebContents](web-contents.md)
  * `url` URL
  * `error` String - The error code
- * `certificate` Object
-   * `data` String - PEM encoded data
-   * `issuerName` String - Issuer's Common Name
-   * `subjectName` String - Subject's Common Name
-   * `serialNumber` String - Hex value represented string
-   * `validStart` Integer - Start date of the certificate being valid in seconds
-   * `validExpiry` Integer - End date of the certificate being valid in seconds
-   * `fingerprint` String - Fingerprint of the certificate
+ * `certificate` [Certificate](structures/certificate.md)
  * `callback` Function
 +  * `isTrusted` Boolean - Whether to consider the certificate as trusted
  
  Emitted when failed to verify the `certificate` for `url`, to trust the
  certificate you should prevent the default behavior with

diff --cc docs/api/session.md
Simple merge

diff --cc docs/api/web-contents.md
Simple merge