test(compgen): avoid overwriting "cur"

Author: akinomyoga

test/t/unit/test_unit_compgen.py

@@ -176,15 +176,15 @@ def test_9_inherit_a(self, bash, functions):
     def test_10_option_P_unmatching_prefix(self, bash, functions):
         output = assert_bash_exec(
             bash,
-            "cur='x' _comp__test_compgen -P 'prefix,' -- -W 'alpha apple beta lemon'",
+            "_comp__test_compgen -c 'x' -P 'prefix,' -- -W 'alpha apple beta lemon'",
             want_output=True,
         )
         assert output.strip() == ""
 
     def test_10_option_P_incomplete_prefix(self, bash, functions):
         output = assert_bash_exec(
             bash,
-            "cur='pre' _comp__test_compgen -P 'prefix,' -- -W 'alpha apple beta lemon'",
+            "_comp__test_compgen -c 'pre' -P 'prefix,' -- -W 'alpha apple beta lemon'",
             want_output=True,
         )
         assert (
@@ -195,7 +195,7 @@ def test_10_option_P_incomplete_prefix(self, bash, functions):
     def test_10_option_P_exact_prefix(self, bash, functions):
         output = assert_bash_exec(
             bash,
-            "cur='prefix,' _comp__test_compgen -P 'prefix,' -- -W 'alpha apple beta lemon'",
+            "_comp__test_compgen -c 'prefix,' -P 'prefix,' -- -W 'alpha apple beta lemon'",
             want_output=True,
         )
         assert (
@@ -206,15 +206,15 @@ def test_10_option_P_exact_prefix(self, bash, functions):
     def test_10_option_P_starts_with_prefix(self, bash, functions):
         output = assert_bash_exec(
             bash,
-            "cur='prefix,a' _comp__test_compgen -P 'prefix,' -- -W 'alpha apple beta lemon'",
+            "_comp__test_compgen -c 'prefix,a' -P 'prefix,' -- -W 'alpha apple beta lemon'",
             want_output=True,
         )
         assert output.strip() == "<prefix,alpha><prefix,apple>"
 
     def test_10_option_P_no_match(self, bash, functions):
         output = assert_bash_exec(
             bash,
-            "cur='prefix,x' _comp__test_compgen -P 'prefix,' -- -W 'alpha apple beta lemon'",
+            "_comp__test_compgen -c 'prefix,x' -P 'prefix,' -- -W 'alpha apple beta lemon'",
             want_output=True,
         )
         assert output.strip() == ""