Remove redundant variable dedeclarations

In go 1.22, loop variables are redeclared with each iteration of the
loop, rather than simple updated on each iteration. This means that we
no longer need to manually redeclare variables when they're closed over
by a function.

pkg/gui/presentation/graph/graph.go

@@ -84,7 +84,6 @@ func RenderAux(pipeSets [][]*Pipe, commits []*models.Commit, selectedCommitHash
 	wg.Add(maxProcs)
 
 	for i := 0; i < maxProcs; i++ {
-		i := i
 		go func() {
 			from := i * perProc
 			to := (i + 1) * perProc

pkg/gui/presentation/graph/graph_test.go

@@ -217,7 +217,6 @@ func TestRenderCommitGraph(t *testing.T) {
 	defer color.ForceSetColorLevel(oldColorLevel)
 
 	for _, test := range tests {
-		test := test
 		t.Run(test.name, func(t *testing.T) {
 			getStyle := func(c *models.Commit) style.TextStyle { return style.FgDefault }
 			lines := RenderCommitGraph(test.commits, "blah", getStyle)
@@ -454,7 +453,6 @@ func TestRenderPipeSet(t *testing.T) {
 	defer color.ForceSetColorLevel(oldColorLevel)
 
 	for _, test := range tests {
-		test := test
 		t.Run(test.name, func(t *testing.T) {
 			actualStr := renderPipeSet(test.pipes, "selected", test.prevCommit)
 			t.Log("actual cells:")