Use char for patterns where possible

askama_shared/src/filters/mod.rs

@@ -193,15 +193,15 @@ pub fn format() {}
 /// followed by a blank line becomes a paragraph break `<p>`.
 pub fn linebreaks<T: fmt::Display>(s: T) -> Result<String> {
     let s = s.to_string();
-    let linebroken = s.replace("\n\n", "</p><p>").replace("\n", "<br/>");
+    let linebroken = s.replace("\n\n", "</p><p>").replace('\n', "<br/>");
 
     Ok(format!("<p>{}</p>", linebroken))
 }
 
 /// Converts all newlines in a piece of plain text to HTML line breaks
 pub fn linebreaksbr<T: fmt::Display>(s: T) -> Result<String> {
     let s = s.to_string();
-    Ok(s.replace("\n", "<br/>"))
+    Ok(s.replace('\n', "<br/>"))
 }
 
 /// Replaces only paragraph breaks in plain text with appropriate HTML

askama_shared/src/generator.rs

@@ -981,7 +981,7 @@ impl<'a, S: std::hash::BuildHasher> Generator<'a, S> {
         for s in mem::take(&mut self.buf_writable) {
             match s {
                 Writable::Lit(s) => {
-                    buf_format.write(&s.replace("{", "{{").replace("}", "}}"));
+                    buf_format.write(&s.replace('{', "{{").replace('}', "}}"));
                     size_hint += s.len();
                 }
                 Writable::Expr(s) => {