fix logic for the case written several attributes

Author: rchaser53

src/imports.rs

@@ -268,6 +268,13 @@ impl UseTree {
                 false
             };
 
+            // FIXME other nice way not to rewrite Rewrite trait
+            let attr_str = if allow_extend {
+                attr_str.replace("\n", " ")
+            } else {
+                attr_str
+            };
+
             combine_strs_with_missing_comments(
                 context,
                 &attr_str,

tests/source/issue-3343/two.rs

@@ -12,3 +12,7 @@ use total_len_is::_51___;
 
 /// this is a comment to test is_sugared_doc property
 use core::convert;
+
+#[foooooo]
+#[barrrrr]
+use total_len_is::_50______;

tests/target/issue-3343/one.rs

@@ -12,3 +12,7 @@ use total_len_is::_51___;
 
 /// this is a comment to test is_sugared_doc property
 use core::convert;
+
+#[foooooo]
+#[barrrrr]
+use total_len_is::_50______;

tests/target/issue-3343/two.rs

@@ -10,3 +10,5 @@ use total_len_is::_51___;
 
 /// this is a comment to test is_sugared_doc property
 use core::convert;
+
+#[foooooo] #[barrrrr] use total_len_is::_50______;