small edits to glyph construction example script

assets/code/building-tools/font/buildAccentedGlyphsRF3.py

@@ -7,10 +7,13 @@ from glyphConstruction import ParseGlyphConstructionListFromString, GlyphConstru
 
 # define glyph constructions
 txt = '''\
-agrave = a + grave@center,top
+?agrave = a + grave@center,top
 aacute = a + acute@center,top
 '''
 
+# filter out lines starting with '?'
+txt = '\n'.join([L for L in txt.split('\n') if not L.startswith('?')])
+
 # get the actual glyph constructions from text
 constructions = ParseGlyphConstructionListFromString(txt)
 
@@ -24,7 +27,7 @@ for construction in constructions:
     constructionGlyph = GlyphConstructionBuilder(construction, font)
 
     # get the destination glyph in the font
-    glyph = font.newGlyph(constructionGlyph.name)
+    glyph = font.newGlyph(constructionGlyph.name, clear=True)
 
     # draw the construction glyph into the destination glyph
     constructionGlyph.draw(glyph.getPen())