Change some instances of .connect() to .join()

src/test/auxiliary/plugin_args.rs

@@ -36,7 +36,7 @@ impl TTMacroExpander for Expander {
                    sp: Span,
                    _: &[ast::TokenTree]) -> Box<MacResult+'cx> {
         let args = self.args.iter().map(|i| pprust::meta_item_to_string(&*i))
-            .collect::<Vec<_>>().connect(", ");
+            .collect::<Vec<_>>().join(", ");
         let interned = token::intern_and_get_ident(&args[..]);
         MacEager::expr(ecx.expr_str(sp, interned))
     }

src/test/run-pass/issue-3563-3.rs

@@ -108,7 +108,7 @@ impl fmt::Display for AsciiArt {
                               .collect::<Vec<String>>();
 
         // Concatenate the lines together using a new-line.
-        write!(f, "{}", lines.connect("\n"))
+        write!(f, "{}", lines.join("\n"))
     }
 }
 

src/test/run-pass/trait-to-str.rs

@@ -24,7 +24,7 @@ impl<T:to_str> to_str for Vec<T> {
                 self.iter()
                     .map(|e| e.to_string_())
                     .collect::<Vec<String>>()
-                    .connect(", "))
+                    .join(", "))
     }
 }