replace nbsp with standard space when stripping html

fixes https://anki.tenderapp.com/discussions/ankidesktop/1952-duplicate-not-detected-on-paste

anki/latex.py

@@ -60,9 +60,6 @@ def _imgLink(col, latex, model):
 
 def _latexFromHtml(col, latex):
     "Convert entities and fix newlines."
-    # entitydefs defines nbsp as \xa0 instead of a standard space, so we
-    # replace it first
-    latex = latex.replace(" ", " ")
     latex = re.sub("<br( /)?>|<div>", "\n", latex)
     latex = re.sub("<.+?>", "", latex)
     latex = stripHTML(latex)

anki/utils.py

@@ -146,6 +146,9 @@ def minimizeHTML(s):
     return s
 
 def entsToTxt(html):
+    # entitydefs defines nbsp as \xa0 instead of a standard space, so we
+    # replace it first
+    html = html.replace(" ", " ")
     def fixup(m):
         text = m.group(0)
         if text[:2] == "&#":