Fix table layout for multi-line values (#52)

Truncate multiline entries to the first line

table/strlimit.go

@@ -1,14 +1,28 @@
 package table
 
-import "github.com/mattn/go-runewidth"
+import (
+	"strings"
+
+	"github.com/mattn/go-runewidth"
+)
 
 func limitStr(str string, maxLen int) string {
 	if maxLen == 0 {
 		return ""
 	}
+
+	newLineIndex := strings.Index(str, "\n")
+	if newLineIndex > -1 {
+		str = str[:newLineIndex]
+	}
+
 	if runewidth.StringWidth(str) > maxLen {
 		return runewidth.Truncate(str, maxLen-1, "") + "…"
 	}
 
+	if newLineIndex > -1 {
+		return str + "…"
+	}
+
 	return str
 }

table/strlimit_test.go

@@ -70,6 +70,12 @@ func TestLimitStr(t *testing.T) {
 			max:      5,
 			expected: "直立…",
 		},
+		{
+			name:     "multiline truncated",
+			input:    "hi\nall",
+			max:      5,
+			expected: "hi…",
+		},
 	}
 
 	for _, test := range tests {