Collapse contiguous identical delimiters.

Fixes copy-paste of DateTimeField rendering into search expression, as it
separates time from date with 3 spaces.

product/ZSQLCatalog/SearchKey/DateTimeKey.py

@@ -125,9 +125,14 @@ def countDelimiters(value):
     value = ' '.join(split_value[:-1])
   # Count delimiters
   delimiter_count = 0
+  last_delimiter = None
   for char in value:
     if char in delimiter_list:
+      if char != last_delimiter:
         delimiter_count += 1
+        last_delimiter = char
+    else:
+      last_delimiter = None
   return delimiter_count
 
 @profiler_decorator