Import with comment behind must not output newlines

src/dfmt.d

@@ -159,7 +159,7 @@ private:
             const i = index;
             if (i > 0)
             {
-                if (tokens[i-1].line < tokens[i].line)
+                if (tokens[i-1].line < current.line)
                 {
                     if (tokens[i-1].type != tok!"comment"
                         && tokens[i-1].type != tok!"{")
@@ -192,6 +192,8 @@ private:
                 {
                     writeToken();
                     tempIndent = 0;
+                    if (current.type == tok!"comment")
+                        break;
                     if (!(t == tok!"import" && current.type == tok!"import"))
                         write("\n");
                     newline();

tests/swap.d

@@ -0,0 +1,24 @@
+import std.algorithm: swap; // from Phobos standard library
+ 
+// The D solution uses templates and it's similar to the C++ one:
+void mySwap(T)(ref T left, ref T right) {
+    auto temp = left;
+    left = right;
+    right = temp;
+}
+ 
+void main() {
+    import std.stdio;
+ 
+    int[] a = [10, 20];
+    writeln(a);
+ 
+    // The std.algorithm standard library module
+    // contains a generic swap:
+    swap(a[0], a[1]);
+    writeln(a);
+ 
+    // Using mySwap:
+    mySwap(a[0], a[1]);
+    writeln(a);
+}

tests/swap.d.ref

@@ -0,0 +1,24 @@
+import std.algorithm : swap; // from Phobos standard library
+
+// The D solution uses templates and it's similar to the C++ one:
+void mySwap(T)(ref T left, ref T right)
+{
+    auto temp = left;
+    left = right;
+    right = temp;
+}
+
+void main()
+{
+    import std.stdio;
+
+    int[] a = [10, 20];
+    writeln(a);
+    // The std.algorithm standard library module
+    // contains a generic swap:
+    swap(a[0], a[1]);
+    writeln(a);
+    // Using mySwap:
+    mySwap(a[0], a[1]);
+    writeln(a);
+}