Changed approach to space normalization in soup2text(). Plain whitespace stripping followed by reassembly caused too large information loss. Accompanying changes in generic diff files.

- Legacy-Id: 321

ietf/utils/soup2text.py

@@ -39,20 +39,23 @@ def unescape(text):
         text = text.replace(entity, char) # replace ampersand last
     return text
 
-def para(words, pre):    
-    text = " ".join(words)
-    # Fix occasional bad sentence end merges
-    for i in range(1,len(words)):
-        if words[i].startswith(". "):
-            now = words[i-1]+" "+words[i]
-            fix = words[i-1]+words[i]
-            text = text.replace(now, fix)
+def para(words, pre):
+    text = "".join(words)
     text = unescape(text)
     if not pre:
         text = re.sub("[\r\n\t ]+", " ", text)
         text = textwrap.fill(text)  
     return text
 
+def normalize(str):
+    # Normalize whitespace at the beginning and end of the string
+    str = re.sub("^[ \t\n]+", " ", str)
+    str = re.sub("[ \t\n]+$", " ", str)
+    # remove xml PIs and metainformation
+    str = re.sub("<![^>]*>", "", str)
+    str = re.sub("<\?[^>]*\?>", "", str)
+    return str
+
 def render(node, encoding='latin-1', pre=False):
     blocks = []
     words = []
@@ -62,8 +65,8 @@ def render(node, encoding='latin-1', pre=False):
         if isinstance(child, NavigableString):
             str = child.__str__(encoding)
             if str and not node.pre:
-                str = str.strip()
-            if str and not str.startswith("<!") and not str.startswith("<?"):
+                str = normalize(str)
+            if str:
                 words.append(str)
         elif isinstance(child, Tag):
             if child.name in ignore_tags:

test/diff/generic-diff_produced-by-1

@@ -1,6 +1,6 @@
 @@ -12,0 +12,5 @@
-+Did you find a bug? Let us know .
++Did you find a bug? Let us know.
 +
-+Any question or suggestion ?
++Any question or suggestion?
 +
-+This page produced by the IETF Secretariat for the IESG
++This page produced by the IETF Secretariat for the IESG

test/diff/generic-diff_produced-by-2

@@ -1,7 +1,7 @@
-@@ -27,0 +23,1 @@
-+Did you find a bug? Let us know .
-@@ -28,0 +25,5 @@
-+Any question or suggestion ?
+@@ -17,0 +17,1 @@
++Did you find a bug? Let us know.
+@@ -18,0 +19,5 @@
++Any question or suggestion?
 +
 +This page produced by the IETF Secretariat for the IESG
 +