[lldb][Test] Escape | chars in enum tests

| is a reserved character in regex.

Author: DavidSpickett

lldb/test/API/lang/c/enum_types/TestEnumTypes.py

@@ -26,7 +26,9 @@ def test_command_line(self):
         self.expect("fr var b", DATA_TYPES_DISPLAYED_CORRECTLY, patterns=[" = B$"])
         self.expect("fr var c", DATA_TYPES_DISPLAYED_CORRECTLY, patterns=[" = C$"])
         self.expect("fr var ab", DATA_TYPES_DISPLAYED_CORRECTLY, patterns=[" = AB$"])
-        self.expect("fr var ac", DATA_TYPES_DISPLAYED_CORRECTLY, patterns=[" = A | C$"])
+        self.expect(
+            "fr var ac", DATA_TYPES_DISPLAYED_CORRECTLY, patterns=[" = A \| C$"]
+        )
         self.expect("fr var all", DATA_TYPES_DISPLAYED_CORRECTLY, patterns=[" = ALL$"])
         # Test that an enum that doesn't match the heuristic we use in
         # TypeSystemClang::DumpEnumValue, gets printed as a raw integer.
@@ -37,7 +39,7 @@ def test_command_line(self):
         self.expect(
             "expression (enum bitfield)nonsense",
             DATA_TYPES_DISPLAYED_CORRECTLY,
-            patterns=[" = B | C | 0x10$"],
+            patterns=[" = B \| C \| 0x10$"],
         )
 
         # Break inside the main.