test: fix test file extensions and inputs for repositories (#161)

This pull request fixes the file extension for two test files that were
incorrectly named. This caused them not to be tested. A new test has
been added to ensure all test files have the correct extension.

This also fixes a bug in some tests where `repositories` inputs included
the repository owner. The owner has been removed from these inputs and
the snapshots have been updated.

tests/snapshots/index.js.md

@@ -24,7 +24,7 @@ Generated by [AVA](https://avajs.dev).
 
 > stdout
 
-    `owner and repositories set, creating token for repositories "actions/create-github-app-token" owned by "actions"␊
+    `owner and repositories set, creating token for repositories "create-github-app-token" owned by "actions"␊
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
@@ -75,6 +75,45 @@ Generated by [AVA](https://avajs.dev).
 
     ''
 
+## main-private-key-with-escaped-newlines.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `owner and repositories not set, creating token for the current repository ("create-github-app-token")␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
+
+## main-repo-skew.test.js
+
+> stderr
+
+    `'Issued at' claim ('iat') must be an Integer representing the time that the assertion was issued.␊
+    [@octokit/auth-app] GitHub API time and system time are different by 30 seconds. Retrying request with the difference accounted for.`
+
+> stdout
+
+    `owner and repositories set, creating token for repositories "failed-repo" owned by "actions"␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
+
 ## main-token-get-owner-set-repo-fail-response.test.js
 
 > stderr
@@ -103,7 +142,7 @@ Generated by [AVA](https://avajs.dev).
 
 > stdout
 
-    `owner and repositories set, creating token for repositories "actions/create-github-app-token,actions/toolkit" owned by "actions"␊
+    `owner and repositories set, creating token for repositories "create-github-app-token,toolkit" owned by "actions"␊
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
@@ -122,7 +161,7 @@ Generated by [AVA](https://avajs.dev).
 
 > stdout
 
-    `owner and repositories set, creating token for repositories "actions/create-github-app-token" owned by "actions"␊
+    `owner and repositories set, creating token for repositories "create-github-app-token" owned by "actions"␊
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
@@ -199,7 +238,7 @@ Generated by [AVA](https://avajs.dev).
 
 > stdout
 
-    `owner not set, creating owner for given repositories "actions/create-github-app-token" in current owner ("actions")␊
+    `owner not set, creating owner for given repositories "create-github-app-token" in current owner ("actions")␊
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊