Fix trailing whitespace (was confused)

Author: johnslavik

Doc/library/functions.rst

@@ -467,7 +467,7 @@ are always available.  They are listed here in alphabetical order.
       deprecated; it should only be passed as a single positional argument.
 
    .. versionchanged:: 3.15
-      ``'−'`` (Unicode minus sign, U+2212) can be now used as an 
+      ``'−'`` (Unicode minus sign, U+2212) can be now used as an
       alternative to ``'-'`` (ASCII hyphen minus) for denoting
       negative sign.