Simplify

Co-authored-by: Petr Viktorin <encukou@gmail.com>

Author: StanFromIreland

Doc/whatsnew/3.14.rst

@@ -897,8 +897,7 @@ Command line and environment
   (Contributed by Noah Kim and Adam Turner in :gh:`118655`.)
 
 * The command-line option :option:`-c` now automatically dedents its code
-  argument before execution. The auto-dedentation behavior only
-  supports spaces and tabs and does not normalize empty lines.
+  argument before execution.
   (Contributed by Jon Crall and Steven Sun in :gh:`103998`.)
 
 * :option:`!-J` is no longer a reserved flag for Jython_,

Include/internal/pycore_unicodeobject.h

@@ -326,7 +326,8 @@ extern PyObject* _PyUnicode_XStrip(
 
 
 /* Dedent a string.
-   Only supports spaces and tabs and doesn't normalize empty lines.
+   Intended to dedent Python source. Unlike `textwrap.dedent`, this
+   only supports spaces and tabs and doesn't normalize empty lines.
    Return a new reference on success, NULL with exception set on error.
    */
 extern PyObject* _PyUnicode_Dedent(PyObject *unicode);

Objects/unicodeobject.c

@@ -13581,7 +13581,8 @@ search_longest_common_leading_whitespace(
 }
 
 /* Dedent a string.
-   Only supports spaces and tabs and doesn't normalize empty lines.
+   Intended to dedent Python source. Unlike `textwrap.dedent`, this
+   only supports spaces and tabs and doesn't normalize empty lines.
    Return a new reference on success, NULL with exception set on error.
    */
 PyObject *