Add an padding in code examples (#1224)

Author: mmalferov

styles/theme-base.css

@@ -1122,13 +1122,18 @@ div.tip p:first-child {
     overflow-x:auto;
     white-space:pre;
 }
-.docs .example-contents > [class$="code"],
+
+.docs .example-contents > [class$="code"]:not(.phpcode),
 .docs .example-contents.screen,
 .informalexample .literallayout {
     padding: .75rem;
     overflow-x: auto;
 }
 
+.docs .example-contents > .phpcode > code {
+    padding: .75rem;
+}
+
 .docs .classsynopsis,
 .refsect1 .fieldsynopsis,
 .refsect1 .dc-description,