Fix comment before contract

Fixes #451.

src/dfmt/formatter.d

@@ -1192,11 +1192,13 @@ private:
                 writeParens(config.dfmt_space_after_cast == OptionalBoolean.t);
             break;
         case tok!"out":
+            if (!peekBackIsSlashSlash) {
                 if (!peekBackIs(tok!"}")
                         && astInformation.contractLocations.canFindIndex(current.index))
                     newline();
                 else if (peekBackIsKeyword)
                     write(" ");
+            }
             writeToken();
             if (!currentIs(tok!"{") && !currentIs(tok!"comment"))
                 write(" ");
@@ -1220,6 +1222,7 @@ private:
             break;
         case tok!"in":
             immutable isContract = astInformation.contractLocations.canFindIndex(current.index);
+            if (!peekBackIsSlashSlash) {
                 if (isContract)
                 {
                     indents.popTempIndents();
@@ -1227,6 +1230,7 @@ private:
                 }
                 else if (!peekBackIsOneOf(false, tok!"(", tok!",", tok!"!"))
                     write(" ");
+            }
             writeToken();
             immutable isFunctionLit = astInformation.funLitStartLocations.canFindIndex(
                     current.index);

tests/allman/issue0451.d.ref

@@ -0,0 +1,40 @@
+class C
+{
+    abstract void f1() //
+    in (true);
+
+    abstract void f2() /* */
+    in (true);
+
+    abstract bool f3() //
+    out (r; r);
+
+    abstract bool f4() /* */
+    out (r; r);
+
+    abstract void f5() //
+    do
+    {
+    }
+
+    abstract void f6() /* */
+    do
+    {
+    }
+
+    abstract bool f7() //
+    in (true) //
+    out (r; r) //
+    do //
+    {
+        return true;
+    }
+
+    abstract bool f8() /* */
+    in (true) /* */
+    out (r; r) /* */
+    do /* */
+    {
+        return true;
+    }
+}

tests/issue0451.d

@@ -0,0 +1,40 @@
+class C
+{
+    abstract void f1() //
+    in (true);
+
+    abstract void f2() /* */
+    in (true);
+
+    abstract bool f3() //
+    out (r; r);
+
+    abstract bool f4() /* */
+    out (r; r);
+
+    abstract void f5() //
+    do
+    {
+    }
+
+    abstract void f6() /* */
+    do
+    {
+    }
+
+    abstract bool f7() //
+    in (true) //
+    out (r; r) //
+    do //
+    {
+        return true;
+    }
+
+    abstract bool f8() /* */
+    in (true) /* */
+    out (r; r) /* */
+    do /* */
+    {
+        return true;
+    }
+}

tests/otbs/issue0451.d.ref

@@ -0,0 +1,36 @@
+class C {
+    abstract void f1() //
+    in (true);
+
+    abstract void f2() /* */
+    in (true);
+
+    abstract bool f3() //
+    out (r; r);
+
+    abstract bool f4() /* */
+    out (r; r);
+
+    abstract void f5() //
+    do {
+    }
+
+    abstract void f6() /* */
+    do {
+    }
+
+    abstract bool f7() //
+    in (true) //
+    out (r; r) //
+    do //
+    {
+        return true;
+    }
+
+    abstract bool f8() /* */
+    in (true) /* */
+    out (r; r) /* */
+    do /* */ {
+        return true;
+    }
+}