use one git push command instead of two

Author: aduh95

lib/promote_release.js

@@ -373,8 +373,8 @@ export default class ReleasePromotion extends Session {
     let prompt = 'Merge proposal branch into staging branch?';
     if (dryRun) {
       cli.info('Run the following commands to merge the staging branch:');
-      cli.info(`git push ${this.upstream} HEAD:refs/heads/${releaseBranch}`);
-      cli.info(`git push ${this.upstream} HEAD:refs/heads/${stagingBranch}`);
+      cli.info(`git push ${this.upstream} HEAD:refs/heads/${releaseBranch
+                                        } HEAD:refs/heads/${stagingBranch}`);
       prompt = 'Ready to continue?';
     }
 
@@ -388,12 +388,9 @@ export default class ReleasePromotion extends Session {
 
     // TODO: find a solution for key passphrase from the terminal
     cli.startSpinner('Merging proposal branch');
-    await Promise.all([
-      forceRunAsync('git', ['push', this.upstream, `HEAD:refs/heads/${releaseBranch}`],
-        { ignoreFailure: false }),
-      forceRunAsync('git', ['push', this.upstream, `HEAD:refs/heads/${stagingBranch}`],
-        { ignoreFailure: false })
-    ]);
+    await forceRunAsync('git', ['push', this.upstream, `HEAD:refs/heads/${releaseBranch}`,
+                                                       `HEAD:refs/heads/${stagingBranch}`],
+    { ignoreFailure: false });
     cli.stopSpinner('Merged proposal branch');
   }
 
@@ -404,8 +401,7 @@ export default class ReleasePromotion extends Session {
     let prompt = `Push release tag and ${this.branch} to ${this.upstream}?`;
     if (dryRun) {
       cli.info('Run the following commands to push to remote:');
-      cli.info(`git push ${this.upstream} ${this.branch}`);
-      cli.info(`git push ${this.upstream} ${tagVersion}`);
+      cli.info(`git push ${this.upstream} ${this.branch} ${tagVersion}`);
       prompt = 'Ready to continue?';
     }
 
@@ -418,10 +414,8 @@ export default class ReleasePromotion extends Session {
     }
 
     cli.startSpinner('Pushing to remote');
-    await Promise.all([
-      forceRunAsync('git', ['push', this.upstream, this.branch], { ignoreFailure: false }),
-      forceRunAsync('git', ['push', this.upstream, tagVersion], { ignoreFailure: false })
-    ]);
+    await forceRunAsync('git', ['push', this.upstream, this.branch, tagVersion],
+      { ignoreFailure: false });
     cli.stopSpinner(`Pushed ${tagVersion} and ${this.branch} to remote`);
   }