Fix unittest

Author: 0xEAB

std/stdio.d

@@ -4733,22 +4733,33 @@ struct lines
     auto deleteMe = testFilename();
     scope(exit) { imported!"std.file".remove(deleteMe); }
 
-    auto f = File(deleteMe, "r");
-    scope(exit) { f.close(); }
+    // Setup
+    {
+        auto f = File(deleteMe, "w");
+        scope(exit) { f.close(); }
+        foreach (i; 1 .. 11)
+            f.writeln(i);
+    }
 
-    auto myLines = lines(f);
-    foreach (string line; myLines)
-        continue;
+    // Actual tests
+    {
+        auto f = File(deleteMe, "r");
+        scope(exit) { f.close(); }
 
-    auto myByLineCopy = f.byLineCopy; // but cannot safely iterate yet
-    /*
-        still `@system`:
-        - cannot call `@system` function `std.stdio.File.ByLineCopy!(immutable(char), char).ByLineCopy.empty`
-        - cannot call `@system` function `std.stdio.File.ByLineCopy!(immutable(char), char).ByLineCopy.popFront`
-        - cannot call `@system` function `std.stdio.File.ByLineCopy!(immutable(char), char).ByLineCopy.front`
-     */
-    //foreach (line; myByLineCopy)
-    //    continue;
+        auto myLines = lines(f);
+        foreach (string line; myLines)
+            continue;
+
+        auto myByLineCopy = f.byLineCopy; // but cannot safely iterate yet
+        /*
+            still `@system`:
+            - cannot call `@system` function `std.stdio.File.ByLineCopy!(immutable(char), char).ByLineCopy.empty`
+            - cannot call `@system` function `std.stdio.File.ByLineCopy!(immutable(char), char).ByLineCopy.popFront`
+            - cannot call `@system` function `std.stdio.File.ByLineCopy!(immutable(char), char).ByLineCopy.front`
+        */
+        //foreach (line; myByLineCopy)
+        //    continue;
+    }
 }
 
 @system unittest