patch 8.2.0674: some source files are too big

Problem:    Some source files are too big.
Solution:   Move text formatting functions to a new file. (Yegappan
            Lakshmanan, closes #6021)
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index c873ca0..ffe6e49 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -806,6 +806,7 @@
 	$(OUTDIR)\tag.obj \
 	$(OUTDIR)\term.obj \
 	$(OUTDIR)\testing.obj \
+	$(OUTDIR)\textformat.obj \
 	$(OUTDIR)\textobject.obj \
 	$(OUTDIR)\textprop.obj \
 	$(OUTDIR)\time.obj \
@@ -1745,6 +1746,8 @@
 
 $(OUTDIR)/term.obj:	$(OUTDIR) testing.c  $(INCL)
 
+$(OUTDIR)/textformat.obj:	$(OUTDIR) textformat.c  $(INCL)
+
 $(OUTDIR)/textobject.obj:	$(OUTDIR) textobject.c  $(INCL)
 
 $(OUTDIR)/textprop.obj:	$(OUTDIR) textprop.c  $(INCL)
@@ -1945,6 +1948,7 @@
 	proto/tag.pro \
 	proto/term.pro \
 	proto/testing.pro \
+	proto/textformat.pro \
 	proto/textobject.pro \
 	proto/textprop.pro \
 	proto/time.pro \