Add symbol name for narrow non-breaking space (#3217)

crates/typst/src/symbols/sym.rs

@@ -24,6 +24,7 @@ pub(crate) const SYM: &[(&str, Symbol)] = symbols! {
     space: [
         ' ',
         nobreak: '\u{A0}',
+        nobreak.narrow: '\u{202F}',
         en: '\u{2002}',
         quad: '\u{2003}',
         third: '\u{2004}',

tests/typ/text/linebreak.typ

@@ -8,6 +8,15 @@ This is a spaceexceedinglylongy.
 // Test two overlong words in a row.
 Supercalifragilisticexpialidocious Expialigoricmetrioxidation.
 
+---
+// Test for non-breaking space and hyphen.
+There are non\u{2011}breaking~characters.
+
+---
+// Test for narrow non-breaking space.
+#show "_": sym.space.nobreak.narrow
+0.1_g, 1_g, 10_g, 100_g, 1_000_g, 10_000_g, 100_000_g, 1_000_000_g
+
 ---
 // Test that there are no unwanted line break opportunities on run change.
 This is partly emp#emph[has]ized.