Warn if prompt contains leading or trailing whitespace

Also strip the prompt in that case. Leading/trailing whitespace in
prompts leads to ugly workarounds in e.g. reStructuredText
documentation, where '*prompt *' is invalid.

1 files changed, 10 insertions, 1 deletions

diff --git a/kconfiglib.py b/kconfiglib.py
index b673c10..5913adc 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -2251,7 +2251,16 @@ class Kconfig(object):
             self._warn("{} defined with multiple prompts in single location"
                        .format(_name_and_loc(node.item)))
 
-        node.prompt = (self._expect_str(), self._parse_cond())
+        prompt = self._expect_str()
+        if prompt != prompt.strip():
+            self._warn("{} has leading or trailing whitespace in its prompt"
+                       .format(_name_and_loc(node.item)))
+
+            # This avoid issues for e.g. reStructuredText documentation, where
+            # '*prompt *' is invalid
+            prompt = prompt.strip()
+
+        node.prompt = (prompt, self._parse_cond())
 
     def _parse_help(self, node):
         # Find first non-blank (not all-space) line and get its indentation