Generalise ignores empty commits assertion

tommarshall · tommarshall · commit 10cca5d83bba · 2016-08-31T11:37:49.000+01:00
Because:

* The error string varies slightly between different versions of git.
* This is causing travis to report the build as failing.
diff --git a/test/validation.bats b/test/validation.bats
@@ -9,7 +9,7 @@ load test_helper
   run git commit -m ''
 
   assert_failure
-  assert_line 'Aborting commit; you did not edit the message.'
+  assert_line --partial 'Aborting commit'
 }
 
 @test "validation: ignores comments" {

Original file line number	Diff line number	Diff line change
`@@ -9,7 +9,7 @@ load test_helper`
`9`	`9`	`run git commit -m ''`
`10`	`10`
`11`	`11`	`assert_failure`
`12`		`- assert_line 'Aborting commit; you did not edit the message.'`
	`12`	`+ assert_line --partial 'Aborting commit'`
`13`	`13`	`}`
`14`	`14`
`15`	`15`	`@test "validation: ignores comments" {`