Fix whitespace issue in HTML report for files with long lines

The Bootstrap col-1/col-11 flex columns caused the line number column to take 8.33% of the table width, which became excessive when a long line made the table very wide, pushing the start of source code far to the right. Override the flex properties so the line number column only takes the space it needs.

Author: sebastianbergmann

src/Report/Html/Renderer/Template/css/style.css

@@ -224,11 +224,22 @@ table + .structure-heading {
  padding-top: 0.5em;
 }
 
+table#code tr {
+  flex-wrap: nowrap;
+}
+
 table#code td:first-of-type {
+  flex: 0 0 auto;
+  width: auto;
   padding-left: .75em;
   padding-right: .75em;
 }
 
+table#code td.codeLine {
+  flex: 1 1 auto;
+  width: auto;
+}
+
 table#code td:first-of-type a {
   text-decoration: none;
 }