; Spelling fix

src/data.c

@@ -630,8 +630,8 @@ global value outside of any lexical scope.  */)
 }
 
 /* FIXME: It has been previously suggested to make this function an
-   alias for symbol-function, but upon discussion at Debbug#23957,
-   there is a risk breaking backward compatiblity, as some users of
+   alias for symbol-function, but upon discussion at Bug#23957,
+   there is a risk breaking backward compatibility, as some users of
    fboundp may expect `t' in particular, rather than any true
    value.  An alias is still welcome so long as the compatibility
    issues are addressed.  */