Add staticcheck tool

vendor/honnef.co/go/tools/simple/s1029/s1029.go

@@ -0,0 +1,31 @@
+package s1029
+
+import (
+	"honnef.co/go/tools/analysis/lint"
+	"honnef.co/go/tools/internal/passes/buildir"
+	"honnef.co/go/tools/internal/sharedcheck"
+
+	"golang.org/x/tools/go/analysis"
+)
+
+var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
+	Analyzer: &analysis.Analyzer{
+		Name:     "S1029",
+		Run:      sharedcheck.CheckRangeStringRunes,
+		Requires: []*analysis.Analyzer{buildir.Analyzer},
+	},
+	Doc: &lint.RawDocumentation{
+		Title: `Range over the string directly`,
+		Text: `Ranging over a string will yield byte offsets and runes. If the offset
+isn't used, this is functionally equivalent to converting the string
+to a slice of runes and ranging over that. Ranging directly over the
+string will be more performant, however, as it avoids allocating a new
+slice, the size of which depends on the length of the string.`,
+		Before:  `for _, r := range []rune(s) {}`,
+		After:   `for _, r := range s {}`,
+		Since:   "2017.1",
+		MergeIf: lint.MergeIfAny,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer