Add formatting libraries to composer.json

vendor/leafo/lessphp/tests/inputs_lessjs/strings.less

@@ -0,0 +1,51 @@
+#strings {
+  background-image: url("http://son-of-a-banana.com");
+  quotes: "~" "~";
+  content: "#*%:&^,)!.(~*})";
+  empty: "";
+  brackets: "{" "}";
+  escapes: "\"hello\" \\world";
+  escapes2: "\"llo";
+}
+#comments {
+  content: "/* hello */ // not-so-secret";
+}
+#single-quote {
+  quotes: "'" "'";
+  content: '""#!&""';
+  empty: '';
+  semi-colon: ';';
+}
+#escaped {
+  filter: ~"DX.Transform.MS.BS.filter(opacity=50)";
+}
+#one-line { image: url(http://tooks.com) }
+#crazy { image: url(http://), "}", url("http://}") }
+#interpolation {
+  @var: '/dev';
+  url: "http://lesscss.org@{var}/image.jpg";
+
+  @var2: 256;
+  url2: "http://lesscss.org/image-@{var2}.jpg";
+
+  @var3: #456;
+  url3: "http://lesscss.org@{var3}";
+
+  @var4: hello;
+  url4: "http://lesscss.org/@{var4}";
+
+  @var5: 54.4px;
+  url5: "http://lesscss.org/@{var5}";
+}
+
+// multiple calls with string interpolation
+
+.mix-mul (@a: green) {
+    color: ~"@{a}";
+}
+.mix-mul-class {
+    .mix-mul(blue);
+    .mix-mul(red);
+    .mix-mul(black);
+    .mix-mul(orange);
+}