Rename T1595 because there is T1595 in typecheck/should_fail already

testsuite/tests/ghc-regress/rename/should_fail/T1595.stderr

-
-T1595.hs:3:20: Not in scope: type constructor or class `Tpyo'

testsuite/tests/ghc-regress/rename/should_fail/T1595.hs → testsuite/tests/ghc-regress/rename/should_fail/T1595a.hs

-module T1595 where
+module T1595a where
 
 a, b :: Integer -> Tpyo
 a = undefined

testsuite/tests/ghc-regress/rename/should_fail/T1595a.stderr

+
+T1595a.hs:3:20: Not in scope: type constructor or class `Tpyo'

testsuite/tests/ghc-regress/rename/should_fail/all.T

@@ -80,4 +80,4 @@ test('T4042', normal, compile_fail, [''])
 test('mc13', normal, compile_fail, [''])
 test('mc14', normal, compile_fail, [''])
 test('T5211', normal, compile, [''])  # Warnings only
-test('T1595', normal, compile_fail, ['']) 
+test('T1595a', normal, compile_fail, [''])