Revert "Rename eolString() to eol() ans pass a MathTeXStream parameter"

This reverts commit 2db682b97e.

src/mathed/InsetMathEnsureMath.h

@@ -44,7 +44,8 @@ public:
 	///
 	void delCol(col_type) override {}
 	///
-	void eol(TeXMathStream &, row_type, bool, bool, bool) const override {}
+	docstring eolString(row_type, bool, bool, bool) const override
+	{ return docstring(); }
 	///
 	docstring eocString(col_type, col_type) const override
 	{ return docstring(); }

src/mathed/InsetMathGrid.cpp

@@ -750,7 +750,7 @@ void InsetMathGrid::updateBuffer(ParIterator const & it, UpdateType utype, bool
 }
 
 
-void InsetMathGrid::eol(TeXMathStream & os, row_type row, bool fragile,
+docstring InsetMathGrid::eolString(row_type row, bool fragile,
 		bool /*latex*/, bool last_eoln) const
 {
 	docstring eol;
@@ -770,9 +770,9 @@ void InsetMathGrid::eol(TeXMathStream & os, row_type row, bool fragile,
 
 	// only add \\ if necessary
 	if (eol.empty() && row + 1 == nrows() && (nrows() == 1 || !last_eoln))
-		return;
+		return docstring();
 
-	os << (fragile ? "\\protect\\\\" : "\\\\") << eol;
+	return (fragile ? "\\protect\\\\" : "\\\\") + eol;
 }
 
 
@@ -1247,7 +1247,7 @@ void InsetMathGrid::write(TeXMathStream & os,
                           row_type end_row, col_type end_col) const
 {
 	MathEnsurer ensurer(os, false);
-	docstring eolstr;
+	docstring eol;
 	// As of 2018 (with amendment in LaTeX 2021/06),
 	// \\ is a robust command and its protection
 	// is no longer necessary
@@ -1299,17 +1299,18 @@ void InsetMathGrid::write(TeXMathStream & os,
 			os << eocString(col + nccols - 1, lastcol);
 			col += nccols;
 		}
-		eol(os, row, fragile, os.latex(), last_eoln);
+		eol = eolString(row, fragile, os.latex(), last_eoln);
+		os << eol;
 		// append newline only if line wasn't completely empty
 		// and the formula is not written on a single line
-		bool const empty = emptyline && eolstr.empty();
+		bool const empty = emptyline && eol.empty();
 		if (!empty && nrows() > 1)
 			os << "\n";
 	}
 	// @TODO use end_row instead of nrows() ?
 	docstring const s = verboseHLine(rowinfo_[nrows()].lines);
 	if (!s.empty()) {
-		if (eolstr.empty()) {
+		if (eol.empty()) {
 			if (fragile)
 				os << "\\protect";
 			os << "\\\\";

src/mathed/InsetMathGrid.h

@@ -246,7 +246,7 @@ protected:
 	virtual int rightMargin() const { return 0; }
 
 	/// returns proper 'end of line' code for LaTeX
-	virtual void eol(TeXMathStream & os, row_type row, bool fragile, bool latex,
+	virtual docstring eolString(row_type row, bool fragile, bool latex,
 			bool last_eoln) const;
 	/// returns proper 'end of column' code for LaTeX
 	virtual docstring eocString(col_type col, col_type lastcol) const;

src/mathed/InsetMathHull.cpp

@@ -1680,26 +1680,27 @@ void InsetMathHull::mutate(HullType newtype)
 }
 
 
-void InsetMathHull::eol(TeXMathStream & os, row_type row, bool fragile, bool latex,
+docstring InsetMathHull::eolString(row_type row, bool fragile, bool latex,
 		bool last_eoln) const
 {
+	docstring res;
 	if (numberedType()) {
 		if (label_[row]) {
 			docstring const name =
 				latex ? escape(label_[row]->getParam("name"))
 				      : label_[row]->getParam("name");
-			os << "\\label{" + name + '}';
+			res += "\\label{" + name + '}';
 		}
 		if (type_ != hullMultline) {
 			if (numbered_[row]  == NONUMBER)
-				os << "\\nonumber ";
+				res += "\\nonumber ";
 			else if (numbered_[row]  == NOTAG)
-				os<< "\\notag ";
+				res += "\\notag ";
 		}
 	}
 	// Never add \\ on the last empty line of eqnarray and friends
 	last_eoln = false;
-	InsetMathGrid::eol(os, row, fragile, latex, last_eoln);
+	return res + InsetMathGrid::eolString(row, fragile, latex, last_eoln);
 }
 
 void InsetMathHull::write(TeXMathStream & os) const

src/mathed/InsetMathHull.h

@@ -202,7 +202,7 @@ protected:
 	/// override to set to 0 for inline equation
 	int border() const override;
 	///
-	void eol(TeXMathStream & os, row_type row, bool fragile, bool latex,
+	docstring eolString(row_type row, bool fragile, bool latex,
 			bool last_eoln) const override;
 
 private: