UBUNTU: [Packaging] annotations: Handle tabs in annotations file

Handle tabs in the annotations file by replacing them with spaces.
While at make the parsing more robust by removing leading and trailing
whitespaces and ignoring empty lines.

Signed-off-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

debian/scripts/misc/kconfig/annotations.py

@@ -50,13 +50,17 @@ class Annotation(Config):
     Parse body of annotations file
     """
     def _parse_body(self, data: str):
-        # Skip comments
-        data = re.sub(r'(?m)^\s*#.*\n?', '', data)
-
-        # Convert multiple spaces to single space to simplifly parsing
-        data = re.sub(r'  *', ' ', data)
-
         for line in data.splitlines():
+            # Replace tabs with spaces, squeeze multiple into singles and
+            # remove leading and trailing spaces
+            line = line.replace('\t', ' ')
+            line = re.sub(r' +', ' ', line)
+            line = line.strip()
+
+            # Ignore empty lines and comments
+            if not line or line.startswith('#'):
+                continue
+
             # Handle includes (recursively)
             m = re.match(r'^include\s+"?([^"]*)"?', line)
             if m: