#15796: Fix \n in readline docstring. Patch by Serhiy Storchaka.

Modules/_io/_iomodule.c

@@ -264,7 +264,7 @@ PyDoc_STRVAR(open_doc,
 "\n"
 "* On output, if newline is None, any '\\n' characters written are\n"
 "  translated to the system default line separator, os.linesep. If\n"
-"  newline is '' or '\n', no translation takes place. If newline is any\n"
+"  newline is '' or '\\n', no translation takes place. If newline is any\n"
 "  of the other legal values, any '\\n' characters written are translated\n"
 "  to the given string.\n"
 "\n"

Modules/_io/iobase.c

@@ -451,7 +451,7 @@ PyDoc_STRVAR(iobase_readline_doc,
     "\n"
     "If limit is specified, at most limit bytes will be read.\n"
     "\n"
-    "The line terminator is always b'\n' for binary files; for text\n"
+    "The line terminator is always b'\\n' for binary files; for text\n"
     "files, the newlines argument to open can be used to select the line\n"
     "terminator(s) recognized.\n");
 

Modules/_io/textio.c

@@ -635,7 +635,7 @@ PyDoc_STRVAR(textiowrapper_doc,
     "\n"
     "* On output, if newline is None, any '\\n' characters written are\n"
     "  translated to the system default line separator, os.linesep. If\n"
-    "  newline is '' or '\n', no translation takes place. If newline is any\n"
+    "  newline is '' or '\\n', no translation takes place. If newline is any\n"
     "  of the other legal values, any '\\n' characters written are translated\n"
     "  to the given string.\n"
     "\n"