Upgrade to coverage 3.7.1 and have it auto-build itself on first use.

third_party/coverage-3.6/coverage/htmlfiles/style.css

-/* CSS styles for Coverage. */
-/* Page-wide styles */
-html, body, h1, h2, h3, p, td, th {
-    margin: 0;
-    padding: 0;
-    border: 0;
-    outline: 0;
-    font-weight: inherit;
-    font-style: inherit;
-    font-size: 100%;
-    font-family: inherit;
-    vertical-align: baseline;
-    }
-
-/* Set baseline grid to 16 pt. */
-body {
-    font-family: georgia, serif;
-    font-size: 1em;
-    }
-
-html>body {
-    font-size: 16px;
-    }
-
-/* Set base font size to 12/16 */
-p {
-    font-size: .75em;           /* 12/16 */
-    line-height: 1.33333333em;  /* 16/12 */
-    }
-
-table {
-    border-collapse: collapse;
-    }
-
-a.nav {
-    text-decoration: none;
-    color: inherit;
-    }
-a.nav:hover {
-    text-decoration: underline;
-    color: inherit;
-    }
-
-/* Page structure */
-#header {
-    background: #f8f8f8;
-    width: 100%;
-    border-bottom: 1px solid #eee;
-    }
-
-#source {
-    padding: 1em;
-    font-family: "courier new", monospace;
-    }
-
-#indexfile #footer {
-    margin: 1em 3em;
-    }
-
-#pyfile #footer {
-    margin: 1em 1em;
-    }
-
-#footer .content {
-    padding: 0;
-    font-size: 85%;
-    font-family: verdana, sans-serif;
-    color: #666666;
-    font-style: italic;
-    }
-
-#index {
-    margin: 1em 0 0 3em;
-    }
-
-/* Header styles */
-#header .content {
-    padding: 1em 3em;
-    }
-
-h1 {
-    font-size: 1.25em;
-}
-
-h2.stats {
-    margin-top: .5em;
-    font-size: 1em;
-}
-.stats span {
-    border: 1px solid;
-    padding: .1em .25em;
-    margin: 0 .1em;
-    cursor: pointer;
-    border-color: #999 #ccc #ccc #999;
-}
-.stats span.hide_run, .stats span.hide_exc,
-.stats span.hide_mis, .stats span.hide_par,
-.stats span.par.hide_run.hide_par {
-    border-color: #ccc #999 #999 #ccc;
-}
-.stats span.par.hide_run {
-    border-color: #999 #ccc #ccc #999;
-}
-
-.stats span.run {
-    background: #ddffdd;
-}
-.stats span.exc {
-    background: #eeeeee;
-}
-.stats span.mis {
-    background: #ffdddd;
-}
-.stats span.hide_run {
-    background: #eeffee;
-}
-.stats span.hide_exc {
-    background: #f5f5f5;
-}
-.stats span.hide_mis {
-    background: #ffeeee;
-}
-.stats span.par {
-    background: #ffffaa;
-}
-.stats span.hide_par {
-    background: #ffffcc;
-}
-
-/* Help panel */
-#keyboard_icon {
-    float: right;
-    cursor: pointer;
-}
-
-.help_panel {
-    position: absolute;
-    background: #ffc;
-    padding: .5em;
-    border: 1px solid #883;
-    display: none;
-}
-
-#indexfile .help_panel {
-    width: 20em; height: 4em;
-}
-
-#pyfile .help_panel {
-    width: 16em; height: 8em;
-}
-
-.help_panel .legend {
-    font-style: italic;
-    margin-bottom: 1em;
-}
-
-#panel_icon {
-    float: right;
-    cursor: pointer;
-}
-
-.keyhelp {
-    margin: .75em;
-}
-
-.keyhelp .key {
-    border: 1px solid black;
-    border-color: #888 #333 #333 #888;
-    padding: .1em .35em;
-    font-family: monospace;
-    font-weight: bold;
-    background: #eee;
-}
-
-/* Source file styles */
-.linenos p {
-    text-align: right;
-    margin: 0;
-    padding: 0 .5em;
-    color: #999999;
-    font-family: verdana, sans-serif;
-    font-size: .625em;   /* 10/16 */
-    line-height: 1.6em;  /* 16/10 */
-    }
-.linenos p.highlight {
-    background: #ffdd00;
-    }
-.linenos p a {
-    text-decoration: none;
-    color: #999999;
-    }
-.linenos p a:hover {
-    text-decoration: underline;
-    color: #999999;
-    }
-
-td.text {
-    width: 100%;
-    }
-.text p {
-    margin: 0;
-    padding: 0 0 0 .5em;
-    border-left: 2px solid #ffffff;
-    white-space: nowrap;
-    }
-
-.text p.mis {
-    background: #ffdddd;
-    border-left: 2px solid #ff0000;
-    }
-.text p.run, .text p.run.hide_par {
-    background: #ddffdd;
-    border-left: 2px solid #00ff00;
-    }
-.text p.exc {
-    background: #eeeeee;
-    border-left: 2px solid #808080;
-    }
-.text p.par, .text p.par.hide_run {
-    background: #ffffaa;
-    border-left: 2px solid #eeee99;
-    }
-.text p.hide_run, .text p.hide_exc, .text p.hide_mis, .text p.hide_par,
-.text p.hide_run.hide_par {
-    background: inherit;
-    }
-
-.text span.annotate {
-    font-family: georgia;
-    font-style: italic;
-    color: #666;
-    float: right;
-    padding-right: .5em;
-    }
-.text p.hide_par span.annotate {
-    display: none;
-    }
-
-/* Syntax coloring */
-.text .com {
-    color: green;
-    font-style: italic;
-    line-height: 1px;
-    }
-.text .key {
-    font-weight: bold;
-    line-height: 1px;
-    }
-.text .str {
-    color: #000080;
-    }
-
-/* index styles */
-#index td, #index th {
-    text-align: right;
-    width: 5em;
-    padding: .25em .5em;
-    border-bottom: 1px solid #eee;
-    }
-#index th {
-    font-style: italic;
-    color: #333;
-    border-bottom: 1px solid #ccc;
-    cursor: pointer;
-    }
-#index th:hover {
-    background: #eee;
-    border-bottom: 1px solid #999;
-    }
-#index td.left, #index th.left {
-    padding-left: 0;
-    }
-#index td.right, #index th.right {
-    padding-right: 0;
-    }
-#index th.headerSortDown, #index th.headerSortUp {
-    border-bottom: 1px solid #000;
-    }
-#index td.name, #index th.name {
-    text-align: left;
-    width: auto;
-    }
-#index td.name a {
-    text-decoration: none;
-    color: #000;
-    }
-#index td.name a:hover {
-    text-decoration: underline;
-    color: #000;
-    }
-#index tr.total {
-    }
-#index tr.total td {
-    font-weight: bold;
-    border-top: 1px solid #ccc;
-    border-bottom: none;
-    }
-#index tr.file:hover {
-    background: #eeeeee;
-    }