xml2lcovutil.py: Add missing raw string prefix (#346)

Symptom was:
> bin/xml2lcovutil.py:262: SyntaxWarning: invalid escape sequence '\s'

Signed-off-by: Sebastian Pipping <[email protected]>

Author: hartwork

bin/xml2lcovutil.py

@@ -259,8 +259,8 @@ def buildFunction(functions, objStack, currentObj, lastLine):
                                       'hit'   : hit})
 
         # just collect the function/class name - ignore the params
-        parseLine = re.compile('(\s*)((def|class)\s*([^\( \t]+))?')
-        #parseLine = re.compile('(\s*)((def|class)\s*([^:]+)(:|$))?')
+        parseLine = re.compile(r'(\s*)((def|class)\s*([^\( \t]+))?')
+        #parseLine = re.compile(r'(\s*)((def|class)\s*([^:]+)(:|$))?')
 
         # no information about actual branch expressions/branch
         #  coverage - only the percentage and number hit/not hit