fixup! Add runCommand function to Go template syntax

Improve the line wrapping a bit, and get rid of the branchName variable; I
prefer literals in tests as much as possible.

Author: stefanhaller

pkg/integration/tests/branch/new_branch_with_prefix_using_run_command.go

@@ -25,9 +25,12 @@ var NewBranchWithPrefixUsingRunCommand = NewIntegrationTest(NewIntegrationTestAr
 			SelectNextItem().
 			Press(keys.Universal.New).
 			Tap(func() {
-				branchName := "my-branch-name"
-				t.ExpectPopup().Prompt().Title(Contains("New branch name")).Type(branchName).Confirm()
-				t.Git().CurrentBranchName("myprefix/dynamic/" + branchName)
+				t.ExpectPopup().Prompt().
+					Title(Contains("New branch name")).
+					InitialText(Equals("myprefix/dynamic/")).
+					Type("my-branch").
+					Confirm()
+				t.Git().CurrentBranchName("myprefix/dynamic/my-branch")
 			})
 	},
 })