Enable intrange linter, and fix warnings

pkg/commands/patch/patch.go

@@ -56,7 +56,7 @@ func (self *Patch) HunkStartIdx(hunkIndex int) int {
 	hunkIndex = lo.Clamp(hunkIndex, 0, len(self.hunks)-1)
 
 	result := len(self.header)
-	for i := 0; i < hunkIndex; i++ {
+	for i := range hunkIndex {
 		result += self.hunks[i].lineCount()
 	}
 	return result

pkg/commands/patch/patch_builder.go

@@ -91,7 +91,7 @@ func (p *PatchBuilder) addFileWhole(info *fileInfo) {
 		// add every line index
 		// TODO: add tests and then use lo.Range to simplify
 		info.includedLineIndices = make([]int, lineCount)
-		for i := 0; i < lineCount; i++ {
+		for i := range lineCount {
 			info.includedLineIndices[i] = i
 		}
 	}