From: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Date: Tue, 10 Mar 2026 08:56:00 +0000 (+0000)
Subject: gh-103997: Remove incorrect statements about `-c` dedenting (gh-138624)
X-Git-Tag: v3.15.0a7~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bdf0105291061f9c89b2a3d4af4f465c54c8874a;p=thirdparty%2FPython%2Fcpython.git

gh-103997: Remove incorrect statements about `-c` dedenting (gh-138624)
---

diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 84b8575284b7..cc3d2f154ed7 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -49,7 +49,7 @@ additional methods of invocation:
   appropriately named script from that directory.
 * When called with ``-c command``, it executes the Python statement(s) given as
   *command*.  Here *command* may contain multiple statements separated by
-  newlines. Leading whitespace is significant in Python statements!
+  newlines.
 * When called with ``-m module-name``, the given module is located on the
   Python module path and executed as a script.
 
diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst
index d4517183d697..772334f40a56 100644
--- a/Doc/whatsnew/3.14.rst
+++ b/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 mirrors
-  :func:`textwrap.dedent`.
+  argument before execution.
   (Contributed by Jon Crall and Steven Sun in :gh:`103998`.)
 
 * :option:`!-J` is no longer a reserved flag for Jython_,
diff --git a/Include/internal/pycore_unicodeobject.h b/Include/internal/pycore_unicodeobject.h
index af6cb84e9ff9..74d84052a2bb 100644
--- a/Include/internal/pycore_unicodeobject.h
+++ b/Include/internal/pycore_unicodeobject.h
@@ -326,7 +326,8 @@ extern PyObject* _PyUnicode_XStrip(
 
 
 /* Dedent a string.
-   Behaviour is expected to be an exact match of `textwrap.dedent`.
+   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);
diff --git a/Misc/NEWS.d/3.14.0b1.rst b/Misc/NEWS.d/3.14.0b1.rst
index 045c47ce5add..cb86c95a672e 100644
--- a/Misc/NEWS.d/3.14.0b1.rst
+++ b/Misc/NEWS.d/3.14.0b1.rst
@@ -1881,8 +1881,8 @@ Improve error message when :exc:`TypeError` occurs during
 .. nonce: BS3uVt
 .. section: Core and Builtins
 
-String arguments passed to "-c" are now automatically dedented as if by
-:func:`textwrap.dedent`. This allows "python -c" invocations to be indented
+String arguments passed to "-c" are now automatically dedented.
+This allows "python -c" invocations to be indented
 in shell scripts without causing indentation errors. (Patch by Jon Crall and
 Steven Sun)
 
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 7756f1a84824..a65c43874e87 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -13581,7 +13581,8 @@ search_longest_common_leading_whitespace(
 }
 
 /* Dedent a string.
-   Behaviour is expected to be an exact match of `textwrap.dedent`.
+   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 *