Grammalecte  Diff

                }
            }
        }
        else if (sWhat === "␣") {
            // merge tokens
            this.lTokens[nTokenRewriteStart]["nMergeUntil"] = nTokenRewriteEnd;
        }
        else if (sWhat.startsWith("␣")) {
            sWhat = this._expand(sWhat, nTokenOffset, nLastToken);
            this.lTokens[nTokenRewriteStart]["nMergeUntil"] = nTokenRewriteEnd;
            this.lTokens[nTokenRewriteStart]["sMergedValue"] = sWhat.slice(1);
        }
        else if (sWhat === "_") {
            // neutralized token
            if (nTokenRewriteEnd - nTokenRewriteStart == 0) {
                this.lTokens[nTokenRewriteStart]["sNewValue"] = "_";
            } else {
                for (let i = nTokenRewriteStart;  i <= nTokenRewriteEnd;  i++) {
                    this.lTokens[i]["sNewValue"] = "_";

                    oMergingToken["sValue"] += " ".repeat(oToken["nStart"] - oMergingToken["nEnd"]) + oToken["sValue"];
                    oMergingToken["nEnd"] = oToken["nEnd"];
                    if (bDebug) {
                        console.log("  MERGED TOKEN: " + oMergingToken["sValue"]);
                    }
                    oToken["bMerged"] = true;
                    bKeepToken = false;
                    if (iToken == nMergeUntil && oMergingToken.hasOwnProperty("sMergedValue")) {
                        oMergingToken["sValue"] = oMergingToken["sMergedValue"];
                        let sSpaceFiller = " ".repeat(oToken["nEnd"] - oMergingToken["nStart"] - oMergingToken["sMergedValue"].length);
                        this.sSentence = this.sSentence.slice(0, oMergingToken["nStart"]) + oMergingToken["sMergedValue"] + sSpaceFiller + this.sSentence.slice(oToken["nEnd"]);
                    }
                }
                if (oToken.hasOwnProperty("nMergeUntil")) {
                    if (iToken > nMergeUntil) { // this token is not already merged with a previous token
                        oMergingToken = oToken;
                    }
                    if (oToken["nMergeUntil"] > nMergeUntil) {
                        nMergeUntil = oToken["nMergeUntil"];