docs: fix grammar and typos in comments and documentation (#5254)

* docs: fix grammar and typos in comments and documentation

* docs: use British English style for e.g. and i.e. (no trailing comma)
Changed from American English style (e.g.,) to British English style (e.g.)
for consistency with the rest of the codebase."

packages/fullstack-server/src/serverfn.rs

@@ -113,7 +113,7 @@ impl ServerFunction {
                                 response.headers_mut().extend(headers);
                             }
 
-                            // it it accepts text/html (i.e., is a plain form post) and doesn't already have a
+                            // if it accepts text/html (i.e., is a plain form post) and doesn't already have a
                             // Location set, then redirect to Referer
                             if accepts_html {
                                 if let Some(referrer) = referrer {