cli/connhelper/internal/syntax: fix linting issues

cli/connhelper/internal/syntax/parser.go:31:2: Duplicate words (the) found (dupword)
        // Note that it shares some features with Bash, due to the the shared
        ^
    cli/connhelper/internal/syntax/quote.go:48:1: cyclomatic complexity 35 of func `Quote` is high (> 16) (gocyclo)
    func Quote(s string, lang LangVariant) (string, error) {
    ^
    cli/connhelper/internal/syntax/quote.go:103:3: shadow: declaration of "offs" shadows declaration at line 56 (govet)
            offs := 0
            ^

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/connhelper/internal/syntax/parser.go

@@ -24,7 +24,7 @@ const (
 
 	// LangMirBSDKorn corresponds to the MirBSD Korn Shell, also known as
 	// mksh, as described at http://www.mirbsd.org/htman/i386/man1/mksh.htm.
-	// Note that it shares some features with Bash, due to the the shared
+	// Note that it shares some features with Bash, due to the shared
 	// ancestry that is ksh.
 	//
 	// We currently follow mksh version 59.

cli/connhelper/internal/syntax/quote.go

@@ -45,6 +45,8 @@ const (
 //
 // Some strings do not require any quoting and are returned unchanged.
 // Those strings can be directly surrounded in single quotes as well.
+//
+//nolint:gocyclo // ignore "cyclomatic complexity 35 of func `Quote` is high (> 16) (gocyclo)"
 func Quote(s string, lang LangVariant) (string, error) {
 	if s == "" {
 		// Special case; an empty string must always be quoted,
@@ -100,7 +102,7 @@ func Quote(s string, lang LangVariant) (string, error) {
 	if nonPrintable {
 		b.WriteString("$'")
 		lastRequoteIfHex := false
-		offs := 0
+		offs = 0
 		for rem := s; len(rem) > 0; {
 			nextRequoteIfHex := false
 			r, size := utf8.DecodeRuneInString(rem)