Fix dedent usage

Author: sergey-miryanov

Tools/c-analyzer/c_parser/parser/__init__.py

@@ -215,7 +215,8 @@ def _iter_source(lines, *, maxtext=11_000, maxlines=200, showtext=False):
 
     if srcinfo.too_much_text(maxtext):
         import textwrap
-        msg = f'''too much text, try to increase MAX_SIZES[MAXTEXT] in cpython/_parser.py
+        msg = f'''
+            too much text, try to increase MAX_SIZES[MAXTEXT] in cpython/_parser.py
             {filename} starting at line {lno_from} to {lno_to}
             has code with length {len(text)} greater than {maxtext}:
             {text}
@@ -224,7 +225,8 @@ def _iter_source(lines, *, maxtext=11_000, maxlines=200, showtext=False):
 
     if srcinfo.too_much_lines(maxlines):
         import textwrap
-        msg = f'''too much lines, try to increase MAX_SIZES[MAXLINES] in cpython/_parser.py
+        msg = f'''
+            too much lines, try to increase MAX_SIZES[MAXLINES] in cpython/_parser.py
             {filename} starting at line {lno_from} to {lno_to}
             has code with number of lines {lno_to - lno_from} greater than {maxlines}:
             {text}