fixup! Don't wrap comments that are part of a table

Author: ayazhafiz

Diff for: rustfmt-core/rustfmt-lib/src/formatting/comment.rs

@@ -869,9 +869,15 @@ fn has_url(s: &str) -> bool {
 }
 
 /// Returns true if the given string may be part of a Markdown talble.
-fn is_table_item(s: &str) -> bool {
-    // This function may return false positive, but should get its job done in most cases.
-    s.trim_start().starts_with('|')
+fn is_table_item(mut s: &str) -> bool {
+    // This function may return false positive, but should get its job done in most cases (i.e.
+    // markdown tables with two column delimiters).
+    s = s.trim_start();
+    return s.starts_with('|')
+        && match s.rfind('|') {
+            Some(0) | None => false,
+            _ => true,
+        };
 }
 
 /// Given the span, rewrite the missing comment inside it if available.