Fix entity bug

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nanohtml2text"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2018"
 readme = "README.md"
 license = "MIT"

src/entity.rs

@@ -1377,7 +1377,7 @@ pub static ENTITIES: &'static [(&'static str, char)] = &[
     ("natur", '\u{00266E}'),
     ("natural", '\u{00266E}'),
     ("naturals", '\u{002115}'),
-    ("nbsp", ' '),
+    ("nbsp", '\u{0000A0}'),
     ("ncap", '\u{002A43}'),
     ("ncaron", '\u{000148}'),
     ("ncedil", '\u{000146}'),

src/lib.rs

@@ -251,7 +251,7 @@ mod tests {
     h6: "<h6>Sixth</h6>next section" to "Sixth\r\n\r\nnext section",
     no_h7: "<h7>Not Header</h7>next section" to "Not Headernext section",
     // HTML entities
-    entity_nbsp: "two&nbsp;&nbsp;spaces" to "two  spaces",
+    entity_nbsp: "two&nbsp;&nbsp;spaces" to "two\u{a0}\u{a0}spaces",
     entity_copy: "&copy; 2017 K3A" to "© 2017 K3A",
     entity_tag: "&lt;printtag&gt;" to "<printtag>",
     entity_currencies: "would you pay in &cent;, &pound;, &yen; or &euro;?" to "would you pay in ¢, £, ¥ or €?",