Method backUp

lib/web/CodeMirror/src/util/StringStream.js:47–47

(n)

    if (found > -1) {this.pos = found; return true}
  }
  backUp(n) {this.pos -= n}
  column() {
    if (this.lastColumnPos < this.start) {
      this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue)