Fix handling of final unmatched text in ssed

Author: sminez

examples/ad_regex/Cargo.lock

@@ -263,7 +263,12 @@ mod impl_structex {
         }
 
         fn max_len(&self) -> usize {
-            usize::MAX
+            if self.is_closed() {
+                let inner = self.inner.borrow();
+                inner.cleared_bytes + inner.gb.len()
+            } else {
+                usize::MAX
+            }
         }
     }
 

examples/ad_regex/src/stream.rs

@@ -102,5 +102,9 @@ where
         (after_match)(h, &caps);
     }
 
+    if pos < h.max_len() {
+        h.slice(pos..h.max_len()).write_to(&mut stdout())?;
+    }
+
     Ok(())
 }