Add whitespace check to code format test

compiler/tests/00_code_format_check_test.py

@@ -28,6 +28,7 @@ class code_format_test(openram_test):
                 continue
             errors += check_file_format_tab(code)
             errors += check_file_format_carriage(code)
+            errors += check_file_format_whitespace(code)
 
         for code in source_codes:
             if re.search("gdsMill", code):
@@ -99,6 +100,28 @@ def check_file_format_carriage(file_name):
     return len(key_positions)
 
 
+def check_file_format_whitespace(file_name):
+    """
+    Check if file contains a line with whitespace at the end
+    and return the number of these lines.
+    """
+
+    f = open(file_name, "r")
+    key_positions = []
+    for num, line in enumerate(f.readlines()):
+        if re.match(r".*[ \t]$", line):
+            key_positions.append(num)
+    if len(key_positions) > 0:
+        if len(key_positions) > 10:
+            line_numbers = key_positions[:10] + [" ..."]
+        else:
+            line_numbers = key_positions
+        debug.info(0, "\nFound " + str(len(key_positions)) + " ending whitespace in " +
+                   str(file_name) + " (lines " + ",".join(str(x) for x in line_numbers) + ")")
+    f.close()
+    return len(key_positions)
+
+
 def check_print_output(file_name):
     """Check if any files (except debug.py) call the _print_ function. We should
     use the debug output with verbosity instead!"""