message: Only auto-replace emoji following ^ or \s
  So as not to cause issues when typing e.g. `This is what was tested: ` (the "d:" used to be transformed into an emoji)
diff: @@ -50,7 +50,7 @@ const REGEX_MATRIXTO_MARKDOWN_GLOBAL = new RegExp(MATRIXTO_MD_LINK_PATTERN, 'g')
  import {asciiRegexp, shortnameToUnicode, emojioneList, asciiList, mapUnicodeToShort} from 'emojione';
  const EMOJI_SHORTNAMES = Object.keys(emojioneList);
  const EMOJI_UNICODE_TO_SHORTNAME = mapUnicodeToShort();
  -const REGEX_EMOJI_WHITESPACE = new RegExp('(' + asciiRegexp + ')\\s$');
  +const REGEX_EMOJI_WHITESPACE = new RegExp('(?:^|\\s)(' + asciiRegexp + ')\\s$');
  const TYPING_USER_TIMEOUT = 10000, TYPING_SERVER_TIMEOUT = 30000;
  @@ -393,7 +393,7 @@ export default class MessageComposerInput extends React.Component {
  const newContentState = Modifier.replaceText(
  editorState.getCurrentContent(),
  currentSelection.merge({
  - anchorOffset: currentStartOffset - emojiMatch[0].length,
  + anchorOffset: currentStartOffset - emojiMatch[1].length - 1,
  focusOffset: currentStartOffset,
  }),
  unicodeEmoji,
  