use unsigned integer in test and fix CI/linter complaint

Author: LuxxxLucy

pkg/commands/git_commands/commit_test.go

@@ -230,7 +230,7 @@ func TestCommitShowCmdObj(t *testing.T) {
 	type scenario struct {
 		testName            string
 		filterPath          string
-		contextSize         int
+		contextSize         uint64
 		similarityThreshold int
 		ignoreWhitespace    bool
 		extDiffCmd          string

pkg/commands/git_commands/stash_test.go

@@ -100,7 +100,7 @@ func TestStashStashEntryCmdObj(t *testing.T) {
 	type scenario struct {
 		testName            string
 		index               int
-		contextSize         int
+		contextSize         uint64
 		similarityThreshold int
 		ignoreWhitespace    bool
 		expected            []string

pkg/commands/git_commands/working_tree_test.go

@@ -210,7 +210,7 @@ func TestWorkingTreeDiff(t *testing.T) {
 		plain               bool
 		cached              bool
 		ignoreWhitespace    bool
-		contextSize         int
+		contextSize         uint64
 		similarityThreshold int
 		runner              *oscommands.FakeCmdObjRunner
 	}
@@ -352,7 +352,7 @@ func TestWorkingTreeShowFileDiff(t *testing.T) {
 		reverse          bool
 		plain            bool
 		ignoreWhitespace bool
-		contextSize      int
+		contextSize      uint64
 		runner           *oscommands.FakeCmdObjRunner
 	}