Fix accidentally removed semicolon that broke the style of line gutter backgrounds

And don't put indentation in css strings.

Issue #4312

Author: marijnh

src/measurement/update_line.js

@@ -95,15 +95,13 @@ function updateLineGutter(cm, lineView, lineN, dims) {
   if (lineView.line.gutterClass) {
     let wrap = ensureLineWrapped(lineView)
     lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
-                                    `left: ${cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth}px
-                                    width: ${dims.gutterTotalWidth}px`)
+                                    `left: ${cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth}px; width: ${dims.gutterTotalWidth}px`)
     wrap.insertBefore(lineView.gutterBackground, lineView.text)
   }
   let markers = lineView.line.gutterMarkers
   if (cm.options.lineNumbers || markers) {
     let wrap = ensureLineWrapped(lineView)
-    let gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", `left:
-                                           ${cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth}px`)
+    let gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", `left: ${cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth}px`)
     cm.display.input.setUneditable(gutterWrap)
     wrap.insertBefore(gutterWrap, lineView.text)
     if (lineView.line.gutterClass)
@@ -112,8 +110,7 @@ function updateLineGutter(cm, lineView, lineN, dims) {
       lineView.lineNumber = gutterWrap.appendChild(
         elt("div", lineNumberFor(cm.options, lineN),
             "CodeMirror-linenumber CodeMirror-gutter-elt",
-            `left: ${dims.gutterLeft["CodeMirror-linenumbers"]}px;
-            width: ${cm.display.lineNumInnerWidth}px`))
+            `left: ${dims.gutterLeft["CodeMirror-linenumbers"]}px; width: ${cm.display.lineNumInnerWidth}px`))
     if (markers) for (let k = 0; k < cm.options.gutters.length; ++k) {
       let id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]
       if (found)