Don't check comments without any letters.

Author: tetafro

checks.go

@@ -56,12 +56,30 @@ func checkComments(comments []comment, settings Settings) []Issue {
 
 // checkPeriod checks that the last sentense of the comment ends
 // in a period.
+//
+//nolint:cyclop
 func checkPeriod(c comment) *Issue {
+	lines := strings.Split(c.text, "\n")
+
+	// Check if the comment has any letters. Comments like "---" should not
+	// be checked at all.
+	var hasLetters bool
+	for _, line := range lines {
+		for _, c := range line {
+			if unicode.IsLetter(c) {
+				hasLetters = true
+				break
+			}
+		}
+	}
+	if !hasLetters {
+		return nil
+	}
+
 	// Check last non-empty line
 	var found bool
 	var line string
 	var pos position
-	lines := strings.Split(c.text, "\n")
 	for i := len(lines) - 1; i >= 0; i-- {
 		line = strings.TrimRightFunc(lines[i], unicode.IsSpace)
 		if line == "" {

checks_test.go

@@ -207,32 +207,14 @@ func TestCheckPeriod(t *testing.T) {
 			},
 		},
 		{
-			name: "single closing parenthesis with period",
+			name: "separator comment without period",
 			comment: comment{
-				lines: []string{"//)."},
-				text:  ").",
+				lines: []string{"// ---"},
+				text:  "---",
 				start: start,
 			},
 			issue: nil,
 		},
-		{
-			name: "single closing parenthesis without period",
-			comment: comment{
-				lines: []string{"//)"},
-				text:  ")",
-				start: start,
-			},
-			issue: &Issue{
-				Pos: token.Position{
-					Filename: "filename.go",
-					Offset:   0,
-					Line:     1,
-					Column:   4,
-				},
-				Message:     "Comment should end in a period",
-				Replacement: "//).",
-			},
-		},
 	}
 
 	for _, tt := range testCases {