Fix panic with single parenthesis in comment.

Author: Denis Krivak

godot.go

@@ -291,6 +291,11 @@ func checkLastChar(s string) bool {
 	}
 	// Trim parenthesis for cases when the whole sentence is inside parenthesis
 	s = strings.TrimRight(s, ")")
+	// Don't panic when comment looks like this: `// )`
+	// TODO: Check previous line (which is not available in this function right now)
+	if len(s) == 0 {
+		return true
+	}
 	for _, ch := range lastChars {
 		if string(s[len(s)-1]) == ch {
 			return true

godot_test.go

@@ -150,6 +150,18 @@ func TestCheckComment(t *testing.T) {
 			ok:      false,
 			pos:     position{line: 0, column: 17},
 		},
+		{
+			name:    "singleline comment: single closing parenthesis without period",
+			comment: "// )",
+			ok:      true,
+			pos:     position{},
+		},
+		{
+			name:    "singleline comment: empty",
+			comment: "// ",
+			ok:      true,
+			pos:     position{},
+		},
 		// Multiline comments
 		{
 			name:    "multiline comment: ok",
@@ -271,6 +283,18 @@ func TestCheckComment(t *testing.T) {
 			ok:      false,
 			pos:     position{line: 2, column: 7},
 		},
+		{
+			name:    "multiline comment: single closing parenthesis without period",
+			comment: "/*\n" + " )\n" + "*/",
+			ok:      true,
+			pos:     position{},
+		},
+		{
+			name:    "multiline comment: empty",
+			comment: "/**/",
+			ok:      true,
+			pos:     position{},
+		},
 	}
 
 	for _, tt := range testCases {