diff --git a/readls.go b/readls.go
index 28dd06d..de50f19 100644
--- a/readls.go
+++ b/readls.go
@@ -2,9 +2,12 @@ package eol
 
 import (
 	"io"
+
+	"sourcecode.social/reiver/go-opt"
 )
 
 func ReadLS(runescanner io.RuneScanner) (size int, err error) {
-	const runeNumber = 1
-	return readthisrune(runescanner, ls, runeNumber)
+	const characterNumber uint64 = 1
+	var circumstance internalCircumstance = specifyCircumstance(opt.Something(LS), characterNumber)
+	return readthisrune(circumstance, runescanner, ls)
 }
diff --git a/readls_test.go b/readls_test.go
index 4060afc..5ba5c41 100644
--- a/readls_test.go
+++ b/readls_test.go
@@ -67,103 +67,103 @@ func TestReadLS_fail(t *testing.T) {
 	}{
 		{
 			Value: "",
-			ExpectedError: `eol: problem reading character №1 of end-of-line sequence: EOF`,
+			ExpectedError: `eol: problem reading character №1 of end-of-line sequence "\u2028": EOF`,
 		},
 
 
 
 		{
 			Value: "\n",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '\n' (U+000A)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '\n' (U+000A)`,
 		},
 		{
 			Value: "\r",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '\r' (U+000D)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '\r' (U+000D)`,
 		},
 		{
 			Value: "\u0085",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '\u0085' (U+0085)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '\u0085' (U+0085)`,
 		},
 
 
 
 		{
 			Value: "😈",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '😈' (U+1F608)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '😈' (U+1F608)`,
 		},
 
 
 
 		{
 			Value: "\napple banana cherry",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '\n' (U+000A)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '\n' (U+000A)`,
 		},
 		{
 			Value: "\rapple banana cherry",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '\r' (U+000D)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '\r' (U+000D)`,
 		},
 		{
 			Value: "\u0085apple banana cherry",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '\u0085' (U+0085)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '\u0085' (U+0085)`,
 		},
 
 
 
 		{
 			Value: "😈apple banana cherry",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '😈' (U+1F608)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '😈' (U+1F608)`,
 		},
 
 
 
 		{
 			Value: " \n",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found ' ' (U+0020)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found ' ' (U+0020)`,
 		},
 		{
 			Value: " \r",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found ' ' (U+0020)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found ' ' (U+0020)`,
 		},
 		{
 			Value: " \u0085",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found ' ' (U+0020)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found ' ' (U+0020)`,
 		},
 		{
 			Value: " \u2028",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found ' ' (U+0020)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found ' ' (U+0020)`,
 		},
 
 
 
 		{
 			Value: " 😈",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found ' ' (U+0020)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found ' ' (U+0020)`,
 		},
 
 
 
 		{
 			Value: ".\n",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '.' (U+002E)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '.' (U+002E)`,
 		},
 		{
 			Value: ".\r",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '.' (U+002E)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '.' (U+002E)`,
 		},
 		{
 			Value: ".\u0085",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '.' (U+002E)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '.' (U+002E)`,
 		},
 		{
 			Value: ".\u2028",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '.' (U+002E)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '.' (U+002E)`,
 		},
 
 
 
 		{
 			Value: ".😈",
-			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line character №1 — instead found '.' (U+002E)`,
+			ExpectedError: `eol: line-separator (LS) character (U+2028) not found for end-of-line sequence "\u2028" character №1 — instead found '.' (U+002E)`,
 		},
 	}