Revert "Don't collect lines"

This reverts commit 51d38ea1a5.

src/main.rs

@@ -575,7 +575,8 @@ fn handle_relative_connection(
         if let Some(i) = partial {
             let mut last_empty = true;
             let mut block = 0;
-            let mut lines = lines.map(Result::unwrap_or_default);
+            let lines: Vec<_> = lines.map(Result::unwrap_or_default).collect();
+            let mut lines = lines.into_iter();
             if i > 0 {
                 for line in lines.by_ref() {
                     let empty = line.trim().is_empty();
@@ -592,7 +593,7 @@ fn handle_relative_connection(
                 }
             }
 
-            for line in lines.by_ref() {
+            for line in lines.clone() {
                 let empty = line.trim().is_empty();
                 if empty == last_empty {
                     continue;