add missing spaces in #16758 warning

diff --git a/src/librustc_trans/glue.rs b/src/librustc_trans/glue.rs
index 1af816845b0b5cb0764e43c7b5f3d0285581fff0..a70e877c89609f774b5f77ff939e5655753d2380 100644 (file)
--- a/src/librustc_trans/glue.rs
+++ b/src/librustc_trans/glue.rs
@@ -561,8 +561,8 @@ fn make_drop_glue<'blk, 'tcx>(bcx: Block<'blk, 'tcx>, v0: ValueRef, g: DropGlueK
                     } else {
                         // Give the user a heads up that we are doing something
                         // stupid and dangerous.
-                        bcx.sess().warn(&format!("Ignoring drop flag in destructor for {}\
-                                                 because the struct is unsized. See issue\
+                        bcx.sess().warn(&format!("Ignoring drop flag in destructor for {} \
+                                                 because the struct is unsized. See issue \
                                                  #16758", t));
                         trans_struct_drop(bcx, t, v0)
                     }