#wrapper {
  height: 100%;
  z-index: 0;
}
.CodeMirror {
  font-family: 'Roboto Mono', Menlo, 'Lucida Console', Monaco, monospace;
  height: auto;
  /* CodeMirror has a default z-index of 4. Set to 0 to avoid collisions with fixed header. */
  z-index: 0;
}
.CodeMirror-linenumbers {
  background-color: #fafafa;
}
.CodeMirror-linenumber {
  color: #757575;
}
.CodeMirror-ruler {
  border-left: 1px solid #ddd;
}
.cm-tab:before {
  color: #757575;
  content: "\2192";
  position: absolute;
}
.cm-trailingspace {
  background-color: #ef9a9a;
  border: 1px solid #f44336;
  border-radius: 3px;
}

#wrapper {
  height: 100%;
  z-index: 0;
}
.CodeMirror {
  font-family: 'Roboto Mono', 'SF Mono', 'Lucida Console', Monaco, monospace;
  height: auto;
  /* CodeMirror has a default z-index of 4. Set to 0 to avoid collisions with fixed header. */
  z-index: 0;
}
.CodeMirror-linenumbers {
  background-color: #fafafa;
}
.CodeMirror-linenumber {
  color: #757575;
}
.CodeMirror-ruler {
  border-left: 1px solid #ddd;
}
.cm-tab:before {
  color: #757575;
  content: "\2192";
  position: absolute;
}
.cm-trailingspace {
  background-color: #ef9a9a;
  border: 1px solid #f44336;
  border-radius: 3px;
}

Replace 'Menlo' with 'SF Mono'
Replace 'Menlo' with 'SF Mono'

'Menlo' was replaced by 'SF Mono' from Mac OS 10.11,
And Menlo is not rendering symbols and characters correctly.

See also https://gerrit-review.googlesource.com/c/gerrit/+/246513

Change-Id: Iff8c94d5d77d7388f32bb62d67438e5e97f2ab80
