Improve smart-quote direction around punctuation

An apostrophe or quotation mark should point right (start a quote) if
it is preceded either by whitespace or a punctuation character.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/generate_html.rs b/src/generate_html.rs
index 6909871..36f3325 100644
--- a/src/generate_html.rs
+++ b/src/generate_html.rs
@@ -468,6 +468,8 @@ fn sanitize_text(text: &str, fancy: bool) -> String {
             true => chars[i + 1],
             false => ' ',
         };
+        let is_whitespace = |c: char| c.is_whitespace() || "()[].,".contains(c);
+
         match c {
             '&' => {
                 // The HTML syntax for unicode characters is &#0000
@@ -477,14 +479,14 @@ fn sanitize_text(text: &str, fancy: bool) -> String {
             '<' => output.push_str("&lt;"),
             '>' => output.push_str("&gt;"),
             '"' => match fancy {
-                true => match prev.is_whitespace() {
+                true => match is_whitespace(prev) {
                     true  => output.push('“'),
                     false => output.push('”'),
                 }
                 false => output.push_str("&#34;"),
             },
             '\'' => match fancy {
-                true => match prev.is_whitespace() {
+                true => match is_whitespace(prev) {
                     true  => output.push('‘'),
                     false => output.push('’'),
                 }