Pygments: Fix styles override.

This fixes #119.

docs/blog/theme/pygments/murphy.min.css

@@ -1 +1 @@
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+.highlight .hll{background-color:#ffc}.highlight{background:#fff}.highlight .c{color:#666;font-style:italic}.highlight .err{color:red;background-color:#faa}.highlight .k{color:#289;font-weight:700}.highlight .o{color:#333}.highlight .ch,.highlight .cm{color:#666;font-style:italic}.highlight .cp{color:#579}.highlight .c1,.highlight .cpf{color:#666;font-style:italic}.highlight .cs{color:#c00;font-weight:700;font-style:italic}.highlight .gd{color:#a00000}.highlight .ge{font-style:italic}.highlight .gr{color:red}.highlight .gh{color:navy;font-weight:700}.highlight .gi{color:#00a000}.highlight .go{color:#888}.highlight .gp{color:#c65d09}.highlight .gp,.highlight .gs,.highlight .gu{font-weight:700}.highlight .gu{color:purple}.highlight .gt{color:#04d}.highlight .kc,.highlight .kd,.highlight .kn{color:#289;font-weight:700}.highlight .kp{color:#08f;font-weight:700}.highlight .kr{color:#289;font-weight:700}.highlight .kt{color:#66f;font-weight:700}.highlight .m{color:#60e;font-weight:700}.highlight .s{background-color:#e0e0ff}.highlight .na{color:#007}.highlight .nb{color:#072}.highlight .nc{color:#e9e;font-weight:700}.highlight .no{color:#5ed;font-weight:700}.highlight .nd{color:#555;font-weight:700}.highlight .ni{color:#800}.highlight .ne{color:red;font-weight:700}.highlight .nf{color:#5ed;font-weight:700}.highlight .nl{color:#970;font-weight:700}.highlight .nn{color:#0e84b5;font-weight:700}.highlight .nt{color:#070}.highlight .nv{color:#036}.highlight .ow{color:#000;font-weight:700}.highlight .w{color:#bbb}.highlight .mb,.highlight .mf{color:#60e;font-weight:700}.highlight .mh{color:#058;font-weight:700}.highlight .mi{color:#66f;font-weight:700}.highlight .mo{color:#40e;font-weight:700}.highlight .sa,.highlight .sb{background-color:#e0e0ff}.highlight .sc{color:#88f}.highlight .dl{background-color:#e0e0ff}.highlight .sd{color:#d42}.highlight .s2,.highlight .se{background-color:#e0e0ff}.highlight .se{color:#666;font-weight:700}.highlight .sh{background-color:#e0e0ff}.highlight .si{background-color:#eee}.highlight .sx{color:#f88;background-color:#e0e0ff}.highlight .sr{color:#000}.highlight .s1,.highlight .sr{background-color:#e0e0ff}.highlight .ss{color:#fc8}.highlight .bp{color:#072}.highlight .fm{color:#5ed;font-weight:700}.highlight .vc{color:#ccf}.highlight .vg{color:#f84}.highlight .vi{color:#aaf}.highlight .vm{color:#036}.highlight .il{color:#66f;font-weight:700}