Issue #20530: Argument Clinic's signature format has been revised again.
The new syntax is highly human readable while still preventing false
positives.  The syntax also extends Python syntax to denote "self" and
positional-only parameters, allowing inspect.Signature objects to be
totally accurate for all supported builtins in Python 3.4.
diff --git a/Modules/clinic/_lzmamodule.c.h b/Modules/clinic/_lzmamodule.c.h
index 1848891..c1ad882 100644
--- a/Modules/clinic/_lzmamodule.c.h
+++ b/Modules/clinic/_lzmamodule.c.h
@@ -3,7 +3,9 @@
 [clinic start generated code]*/
 
 PyDoc_STRVAR(_lzma_LZMACompressor_compress__doc__,
-"sig=($self, data)\n"
+"compress($self, data, /)\n"
+"--\n"
+"\n"
 "Provide data to the compressor object.\n"
 "\n"
 "Returns a chunk of compressed data if possible, or b\'\' otherwise.\n"
@@ -38,7 +40,9 @@
 }
 
 PyDoc_STRVAR(_lzma_LZMACompressor_flush__doc__,
-"sig=($self)\n"
+"flush($self, /)\n"
+"--\n"
+"\n"
 "Finish the compression process.\n"
 "\n"
 "Returns the compressed data left in internal buffers.\n"
@@ -58,7 +62,9 @@
 }
 
 PyDoc_STRVAR(_lzma_LZMADecompressor_decompress__doc__,
-"sig=($self, data)\n"
+"decompress($self, data, /)\n"
+"--\n"
+"\n"
 "Provide data to the decompressor object.\n"
 "\n"
 "Returns a chunk of decompressed data if possible, or b\'\' otherwise.\n"
@@ -94,7 +100,9 @@
 }
 
 PyDoc_STRVAR(_lzma_LZMADecompressor___init____doc__,
-"sig=(format=FORMAT_AUTO, memlimit=None, filters=None)\n"
+"LZMADecompressor(format=FORMAT_AUTO, memlimit=None, filters=None)\n"
+"--\n"
+"\n"
 "Create a decompressor object for decompressing data incrementally.\n"
 "\n"
 "  format\n"
@@ -137,7 +145,9 @@
 }
 
 PyDoc_STRVAR(_lzma_is_check_supported__doc__,
-"sig=($module, check_id)\n"
+"is_check_supported($module, check_id, /)\n"
+"--\n"
+"\n"
 "Test whether the given integrity check is supported.\n"
 "\n"
 "Always returns True for CHECK_NONE and CHECK_CRC32.");
@@ -165,7 +175,9 @@
 }
 
 PyDoc_STRVAR(_lzma__encode_filter_properties__doc__,
-"sig=($module, filter)\n"
+"_encode_filter_properties($module, filter, /)\n"
+"--\n"
+"\n"
 "Return a bytes object encoding the options (properties) of the filter specified by *filter* (a dict).\n"
 "\n"
 "The result does not include the filter ID itself, only the options.");
@@ -197,7 +209,9 @@
 }
 
 PyDoc_STRVAR(_lzma__decode_filter_properties__doc__,
-"sig=($module, filter_id, encoded_props)\n"
+"_decode_filter_properties($module, filter_id, encoded_props, /)\n"
+"--\n"
+"\n"
 "Return a bytes object encoding the options (properties) of the filter specified by *filter* (a dict).\n"
 "\n"
 "The result does not include the filter ID itself, only the options.");
@@ -228,4 +242,4 @@
 
     return return_value;
 }
-/*[clinic end generated code: output=fe63bc798a5c5c55 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=808fec8216ac712b input=a9049054013a1b77]*/