[note] Compact Code Blocks.css

/* Shrink the blank lines at the start and end of code blocks (use left/right to move into these lines) */

.markdown-source-view.mod-cm6
  .cm-content
  .HyperMD-codeblock-begin:not(.cm-active),
.markdown-source-view.mod-cm6
  .cm-content
  .HyperMD-codeblock-end:not(.cm-active) {
  height: 0.5em;
  color: transparent !important;
  cursor: pointer;
}