Add test case .+ for zb3

internal/stage_wildcard.go

@@ -21,6 +21,11 @@ func testWildcard(stageHarness *test_case_harness.TestCaseHarness) error {
 			Input:            "car",
 			ExpectedExitCode: 1,
 		},
+		{
+			Pattern:          "c.+t",
+			Input:            "coat",
+			ExpectedExitCode: 0,
+		},
 	}
 
 	return RunTestCases(testCases, stageHarness)

internal/test_helpers/fixtures/alternation/success

@@ -18,6 +18,9 @@
 [stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
+[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
+[your_program] coat
+[stage-11] ✓ Received exit code 0.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8

internal/test_helpers/fixtures/backreferences_multiple/success

@@ -100,6 +100,9 @@
 [stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
+[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
+[your_program] coat
+[stage-11] ✓ Received exit code 0.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8

internal/test_helpers/fixtures/backreferences_nested/success

@@ -141,6 +141,9 @@
 [stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
+[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
+[your_program] coat
+[stage-11] ✓ Received exit code 0.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8

internal/test_helpers/fixtures/backreferences_single/success

@@ -59,6 +59,9 @@
 [stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
+[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
+[your_program] coat
+[stage-11] ✓ Received exit code 0.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8

internal/test_helpers/fixtures/wildcard/success

@@ -7,6 +7,9 @@
 [stage-11] ✓ Received exit code 0.
 [stage-11] $ echo -n "car" | ./your_grep.sh -E "c.t"
 [stage-11] ✓ Received exit code 1.
+[stage-11] $ echo -n "coat" | ./your_grep.sh -E "c.+t"
+[your_program] coat
+[stage-11] ✓ Received exit code 0.
 [stage-11] Test passed.
 
 [stage-10] Running tests for Stage #10: ny8