fix error messages in test

Author: perazz

test/fpm_test/test_source_parsing.f90

@@ -240,22 +240,22 @@ subroutine test_nonintrinsic_modules_used(error)
         end if
 
         if (.not. ('ieee_arithmetic' .in. f_source%modules_used)) then
-            call test_failed(error,'Non-Intrinsic module found in modules_used')
+            call test_failed(error,'Non-Intrinsic module not found in modules_used')
             return
         end if
 
         if (.not. ('ieee_exceptions' .in. f_source%modules_used)) then
-            call test_failed(error,'Non-Intrinsic module found in modules_used')
+            call test_failed(error,'Non-Intrinsic module not found in modules_used')
             return
         end if
 
         if (.not. ('ieee_features' .in. f_source%modules_used)) then
-            call test_failed(error,'Non-Intrinsic module found in modules_used')
+            call test_failed(error,'Non-Intrinsic module not found in modules_used')
             return
         end if
 
         if (.not. ('my_module' .in. f_source%modules_used)) then
-            call test_failed(error,'Non-Intrinsic module found in modules_used')
+            call test_failed(error,'Non-Intrinsic module not found in modules_used')
             return
         end if