editing example texts now as I see it could look like.

src/model/example.py

@@ -36,7 +36,8 @@ class Example(Editable):
             inner_xml = example_xml.querySelector("multiwordExample") 
             self.inner = MultiwordExample(inner_xml)
             
-        self.components = [ComponentLexeme(el) for el in inner_xml.childNodes]
+        all_components = [ComponentLexeme(el) for el in inner_xml.childNodes]
+        self.components = [comp for comp in all_components if comp.isValid()]
     
         
     def export(self, doc):
@@ -112,7 +113,7 @@ class MultiwordExample:
         return self.cluster if self.cluster_valid else None 
 
 
-class ComponentLexeme:
+class ComponentLexeme(Editable):
     def __init__(self, xml):
         self.other_attributes = {}
         
@@ -126,6 +127,11 @@ class ComponentLexeme:
             for oth_attr in ["lexical_unit_lexeme_id", "slolex", "kol"]:
                 if xml.hasAttribute(oth_attr):
                     self.other_attributes[oth_attr] = xml.getAttribute(oth_attr)
+        
+        self.text = self.text.strip()
+    
+    def isValid(self):
+        return len(self.text) > 0
     
     def export(self, doc):
         if self.role is None: