lib: update isAlpha

* lib/str.go (isAlpha): Add common punctuation.

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/str.go b/lib/str.go
index 5ccbd33..1d5fd17 100644
--- a/lib/str.go
+++ b/lib/str.go
@@ -56,6 +56,12 @@ func isAlpha(c byte) bool {
 		return true
 	case 'a' <= c && c <= 'z':
 		return true
+	case c == ' ' || c == '.':
+		return true
+	case c == ',' || c == '\'':
+		return true
+	case c == '"':
+		return true
 	}
 	return false
 }